← 2-2 · Carry ten units to the next place · Place-Value Regrouping

Carry ten units to the next place · 12 practice problems

4.NBT.A.24.NBT.A.1

Generated variants — 12

Freshly produced from the archetype’s parameters — problem, figure, and solution derived together.

Variant 1 answer: 7

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $6479$ , there are $6$ thousands, $4$ hundreds, $\blacksquare$ tens, and $9$ ones.

Show solution

Understand

In the number 6479, written as 6 thousands, 4 hundreds, 7 tens, and 9 ones, find the missing digit in the tens place.

Givens

The number is 6479.
It is described as 6 thousands, 4 hundreds, 7 tens, and 9 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The tens digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 6479 with the thousands, hundreds, tens, and ones positions to read off the tens digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 6479 in a place-value chart: the 6 is in the thousands place, the 4 is in the hundreds place, the 7 is in the tens place, and the 9 is in the ones place.

6479 = 6000 + 400 + 70 + 9

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the tens place is 7, so 6479 has 7 tens. That means the box is 7.

\blacksquare = 7

The tens count is simply the digit in the tens column.

Answer: 7

Review

Rebuild the number: 6 thousands + 4 hundreds + 7 tens + 9 ones = 6000 + 400 + 70 + 9 = 6479, which matches, so the box is 7.

Subtract the known parts of 6479 to isolate the tens contribution of 70, which is 7 tens.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the tens digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the tens count is just the digit standing in the tens spot!

Variant 2 answer: 7

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $2756$ , there are $2$ thousands, $\blacksquare$ hundreds, $5$ tens, and $6$ ones.

Show solution

Understand

In the number 2756, written as 2 thousands, 7 hundreds, 5 tens, and 6 ones, find the missing digit in the hundreds place.

Givens

The number is 2756.
It is described as 2 thousands, 7 hundreds, 5 tens, and 6 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The hundreds digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 2756 with the thousands, hundreds, tens, and ones positions to read off the hundreds digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 2756 in a place-value chart: the 2 is in the thousands place, the 7 is in the hundreds place, the 5 is in the tens place, and the 6 is in the ones place.

2756 = 2000 + 700 + 50 + 6

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the hundreds place is 7, so 2756 has 7 hundreds. That means the box is 7.

\blacksquare = 7

The hundreds count is simply the digit in the hundreds column.

Answer: 7

Review

Rebuild the number: 2 thousands + 7 hundreds + 5 tens + 6 ones = 2000 + 700 + 50 + 6 = 2756, which matches, so the box is 7.

Subtract the known parts of 2756 to isolate the hundreds contribution of 700, which is 7 hundreds.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the hundreds digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the hundreds count is just the digit standing in the hundreds spot!

Variant 3 answer: 9

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $3869$ , there are $3$ thousands, $8$ hundreds, $6$ tens, and $\blacksquare$ ones.

Show solution

Understand

In the number 3869, written as 3 thousands, 8 hundreds, 6 tens, and 9 ones, find the missing digit in the ones place.

Givens

The number is 3869.
It is described as 3 thousands, 8 hundreds, 6 tens, and 9 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The ones digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 3869 with the thousands, hundreds, tens, and ones positions to read off the ones digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 3869 in a place-value chart: the 3 is in the thousands place, the 8 is in the hundreds place, the 6 is in the tens place, and the 9 is in the ones place.

3869 = 3000 + 800 + 60 + 9

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the ones place is 9, so 3869 has 9 ones. That means the box is 9.

\blacksquare = 9

The ones count is simply the digit in the ones column.

Answer: 9

Review

Rebuild the number: 3 thousands + 8 hundreds + 6 tens + 9 ones = 3000 + 800 + 60 + 9 = 3869, which matches, so the box is 9.

Subtract the known parts of 3869 to isolate the ones contribution of 9, which is 9 ones.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the ones digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the ones count is just the digit standing in the ones spot!

Variant 4 answer: 3

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $1357$ , there are $1$ thousands, $\blacksquare$ hundreds, $5$ tens, and $7$ ones.

Show solution

Understand

In the number 1357, written as 1 thousands, 3 hundreds, 5 tens, and 7 ones, find the missing digit in the hundreds place.

Givens

The number is 1357.
It is described as 1 thousands, 3 hundreds, 5 tens, and 7 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The hundreds digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 1357 with the thousands, hundreds, tens, and ones positions to read off the hundreds digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 1357 in a place-value chart: the 1 is in the thousands place, the 3 is in the hundreds place, the 5 is in the tens place, and the 7 is in the ones place.

1357 = 1000 + 300 + 50 + 7

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the hundreds place is 3, so 1357 has 3 hundreds. That means the box is 3.

\blacksquare = 3

The hundreds count is simply the digit in the hundreds column.

Answer: 3

Review

Rebuild the number: 1 thousands + 3 hundreds + 5 tens + 7 ones = 1000 + 300 + 50 + 7 = 1357, which matches, so the box is 3.

Subtract the known parts of 1357 to isolate the hundreds contribution of 300, which is 3 hundreds.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the hundreds digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the hundreds count is just the digit standing in the hundreds spot!

Variant 5 answer: 5

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $7545$ , there are $7$ thousands, $\blacksquare$ hundreds, $4$ tens, and $5$ ones.

Show solution

Understand

In the number 7545, written as 7 thousands, 5 hundreds, 4 tens, and 5 ones, find the missing digit in the hundreds place.

Givens

The number is 7545.
It is described as 7 thousands, 5 hundreds, 4 tens, and 5 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The hundreds digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 7545 with the thousands, hundreds, tens, and ones positions to read off the hundreds digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 7545 in a place-value chart: the 7 is in the thousands place, the 5 is in the hundreds place, the 4 is in the tens place, and the 5 is in the ones place.

7545 = 7000 + 500 + 40 + 5

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the hundreds place is 5, so 7545 has 5 hundreds. That means the box is 5.

\blacksquare = 5

The hundreds count is simply the digit in the hundreds column.

Answer: 5

Review

Rebuild the number: 7 thousands + 5 hundreds + 4 tens + 5 ones = 7000 + 500 + 40 + 5 = 7545, which matches, so the box is 5.

Subtract the known parts of 7545 to isolate the hundreds contribution of 500, which is 5 hundreds.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the hundreds digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the hundreds count is just the digit standing in the hundreds spot!

Variant 6 answer: 4

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $4205$ , there are $\blacksquare$ thousands, $2$ hundreds, $0$ tens, and $5$ ones.

Show solution

Understand

In the number 4205, written as 4 thousands, 2 hundreds, 0 tens, and 5 ones, find the missing digit in the thousands place.

Givens

The number is 4205.
It is described as 4 thousands, 2 hundreds, 0 tens, and 5 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The thousands digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 4205 with the thousands, hundreds, tens, and ones positions to read off the thousands digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 4205 in a place-value chart: the 4 is in the thousands place, the 2 is in the hundreds place, the 0 is in the tens place, and the 5 is in the ones place.

4205 = 4000 + 200 + 0 + 5

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the thousands place is 4, so 4205 has 4 thousands. That means the box is 4.

\blacksquare = 4

The thousands count is simply the digit in the thousands column.

Answer: 4

Review

Rebuild the number: 4 thousands + 2 hundreds + 0 tens + 5 ones = 4000 + 200 + 0 + 5 = 4205, which matches, so the box is 4.

Subtract the known parts of 4205 to isolate the thousands contribution of 4000, which is 4 thousands.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the thousands digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the thousands count is just the digit standing in the thousands spot!

Variant 7 answer: 4

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $4630$ , there are $\blacksquare$ thousands, $6$ hundreds, $3$ tens, and $0$ ones.

Show solution

Understand

In the number 4630, written as 4 thousands, 6 hundreds, 3 tens, and 0 ones, find the missing digit in the thousands place.

Givens

The number is 4630.
It is described as 4 thousands, 6 hundreds, 3 tens, and 0 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The thousands digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 4630 with the thousands, hundreds, tens, and ones positions to read off the thousands digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 4630 in a place-value chart: the 4 is in the thousands place, the 6 is in the hundreds place, the 3 is in the tens place, and the 0 is in the ones place.

4630 = 4000 + 600 + 30 + 0

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the thousands place is 4, so 4630 has 4 thousands. That means the box is 4.

\blacksquare = 4

The thousands count is simply the digit in the thousands column.

Answer: 4

Review

Rebuild the number: 4 thousands + 6 hundreds + 3 tens + 0 ones = 4000 + 600 + 30 + 0 = 4630, which matches, so the box is 4.

Subtract the known parts of 4630 to isolate the thousands contribution of 4000, which is 4 thousands.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the thousands digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the thousands count is just the digit standing in the thousands spot!

Variant 8 answer: 3

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $3812$ , there are $\blacksquare$ thousands, $8$ hundreds, $1$ tens, and $2$ ones.

Show solution

Understand

In the number 3812, written as 3 thousands, 8 hundreds, 1 tens, and 2 ones, find the missing digit in the thousands place.

Givens

The number is 3812.
It is described as 3 thousands, 8 hundreds, 1 tens, and 2 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The thousands digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 3812 with the thousands, hundreds, tens, and ones positions to read off the thousands digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 3812 in a place-value chart: the 3 is in the thousands place, the 8 is in the hundreds place, the 1 is in the tens place, and the 2 is in the ones place.

3812 = 3000 + 800 + 10 + 2

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the thousands place is 3, so 3812 has 3 thousands. That means the box is 3.

\blacksquare = 3

The thousands count is simply the digit in the thousands column.

Answer: 3

Review

Rebuild the number: 3 thousands + 8 hundreds + 1 tens + 2 ones = 3000 + 800 + 10 + 2 = 3812, which matches, so the box is 3.

Subtract the known parts of 3812 to isolate the thousands contribution of 3000, which is 3 thousands.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the thousands digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the thousands count is just the digit standing in the thousands spot!

Variant 9 answer: 8

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $9018$ , there are $9$ thousands, $0$ hundreds, $1$ tens, and $\blacksquare$ ones.

Show solution

Understand

In the number 9018, written as 9 thousands, 0 hundreds, 1 tens, and 8 ones, find the missing digit in the ones place.

Givens

The number is 9018.
It is described as 9 thousands, 0 hundreds, 1 tens, and 8 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The ones digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 9018 with the thousands, hundreds, tens, and ones positions to read off the ones digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 9018 in a place-value chart: the 9 is in the thousands place, the 0 is in the hundreds place, the 1 is in the tens place, and the 8 is in the ones place.

9018 = 9000 + 0 + 10 + 8

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the ones place is 8, so 9018 has 8 ones. That means the box is 8.

\blacksquare = 8

The ones count is simply the digit in the ones column.

Answer: 8

Review

Rebuild the number: 9 thousands + 0 hundreds + 1 tens + 8 ones = 9000 + 0 + 10 + 8 = 9018, which matches, so the box is 8.

Subtract the known parts of 9018 to isolate the ones contribution of 8, which is 8 ones.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the ones digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the ones count is just the digit standing in the ones spot!

Variant 10 answer: 3

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $5093$ , there are $5$ thousands, $0$ hundreds, $9$ tens, and $\blacksquare$ ones.

Show solution

Understand

In the number 5093, written as 5 thousands, 0 hundreds, 9 tens, and 3 ones, find the missing digit in the ones place.

Givens

The number is 5093.
It is described as 5 thousands, 0 hundreds, 9 tens, and 3 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The ones digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 5093 with the thousands, hundreds, tens, and ones positions to read off the ones digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 5093 in a place-value chart: the 5 is in the thousands place, the 0 is in the hundreds place, the 9 is in the tens place, and the 3 is in the ones place.

5093 = 5000 + 0 + 90 + 3

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the ones place is 3, so 5093 has 3 ones. That means the box is 3.

\blacksquare = 3

The ones count is simply the digit in the ones column.

Answer: 3

Review

Rebuild the number: 5 thousands + 0 hundreds + 9 tens + 3 ones = 5000 + 0 + 90 + 3 = 5093, which matches, so the box is 3.

Subtract the known parts of 5093 to isolate the ones contribution of 3, which is 3 ones.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the ones digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the ones count is just the digit standing in the ones spot!

Variant 11 answer: 2

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $8124$ , there are $8$ thousands, $1$ hundreds, $\blacksquare$ tens, and $4$ ones.

Show solution

Understand

In the number 8124, written as 8 thousands, 1 hundreds, 2 tens, and 4 ones, find the missing digit in the tens place.

Givens

The number is 8124.
It is described as 8 thousands, 1 hundreds, 2 tens, and 4 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The tens digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 8124 with the thousands, hundreds, tens, and ones positions to read off the tens digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 8124 in a place-value chart: the 8 is in the thousands place, the 1 is in the hundreds place, the 2 is in the tens place, and the 4 is in the ones place.

8124 = 8000 + 100 + 20 + 4

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the tens place is 2, so 8124 has 2 tens. That means the box is 2.

\blacksquare = 2

The tens count is simply the digit in the tens column.

Answer: 2

Review

Rebuild the number: 8 thousands + 1 hundreds + 2 tens + 4 ones = 8000 + 100 + 20 + 4 = 8124, which matches, so the box is 2.

Subtract the known parts of 8124 to isolate the tens contribution of 20, which is 2 tens.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the tens digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the tens count is just the digit standing in the tens spot!

Variant 12 answer: 9

Find the digit $\blacksquare$ , where $\blacksquare$ is one of the numbers from $0$ to $9$ .

In $6792$ , there are $6$ thousands, $7$ hundreds, $\blacksquare$ tens, and $2$ ones.

Show solution

Understand

In the number 6792, written as 6 thousands, 7 hundreds, 9 tens, and 2 ones, find the missing digit in the tens place.

Givens

The number is 6792.
It is described as 6 thousands, 7 hundreds, 9 tens, and 2 ones.
The missing digit is a single digit from 0 to 9.

Unknowns

The tens digit.

Constraints

Each place value digit is 0 through 9.

Plan

#1 Draw a Diagram · also uses: #5 Look for a Pattern

Reading a number by its place values is a direct place-value chart task, so I line up the digits of 6792 with the thousands, hundreds, tens, and ones positions to read off the tens digit.

Execute

#1 Draw a Diagram 4.NBT.A.1

Write 6792 in a place-value chart: the 6 is in the thousands place, the 7 is in the hundreds place, the 9 is in the tens place, and the 2 is in the ones place.

6792 = 6000 + 700 + 90 + 2

Each digit's spot in the number tells you exactly which place it counts, like columns on a chart.

#5 Look for a Pattern 4.NBT.A.2

The digit sitting in the tens place is 9, so 6792 has 9 tens. That means the box is 9.

\blacksquare = 9

The tens count is simply the digit in the tens column.

Answer: 9

Review

Rebuild the number: 6 thousands + 7 hundreds + 9 tens + 2 ones = 6000 + 700 + 90 + 2 = 6792, which matches, so the box is 9.

Subtract the known parts of 6792 to isolate the tens contribution of 90, which is 9 tens.

Standards · min grade 4

4.NBT.A.1 Recognize that a digit represents ten times what it represents in place to its right — Understanding the thousands, hundreds, tens, and ones place groupings of the number.
4.NBT.A.2 Read and write multi-digit whole numbers and compare using symbols — Reading the tens digit directly from the four-digit number.

💡 Each digit lives in its own place column, so the tens count is just the digit standing in the tens spot!