Numbers & Place Value

32 problem types

Place-Value Regrouping

Ten in a place carries forward 2.NBT.A.13.NBT.A.2 · take

Carry ten units to the next place 4.NBT.A.24.NBT.A.1 · take

Skip-count by the changing place value 4.NBT.A.24.OA.C.5 · adapt

Ten hundreds make one thousand 4.NBT.A.22.MD.C.8 · adapt

Ten of a unit carries to the next place 4.NBT.A.14.NBT.A.2 · adapt

Ten tenths make one whole 4.NF.C.64.NF.C.5 · take

Times ten adds one place 4.NBT.A.1 · adapt

Build the Largest or Smallest Value from Digit Cards

Big digits in high places 2.NBT.A.43.NBT.A.2 · take

Place big digits high for largest product 3.OA.C.73.NBT.A.3 · take

Place digit cards for largest or smallest product 3.NBT.A.33.OA.B.5 · take

Build largest and smallest mixed numbers from cards 4.NF.B.3 · take

Count numbers built from digit cards 4.NBT.A.2 · take

Place big digits high to maximize a decimal 4.NF.C.74.NF.C.6 · take

Smaller divisor makes a bigger quotient 4.NBT.B.6 · take

Pin Down a Number from Digit and Range Conditions

Bigger addend, bigger sum 3.OA.A.43.NBT.A.2 · take

Bound an inequality at equality 3.OA.A.43.OA.C.7 · take

Estimate a product to bound an unknown 3.NBT.A.33.OA.C.7 · take

Estimate a product to solve an inequality 3.NBT.A.33.OA.D.8 · take

Find a number satisfying product bounds 3.OA.A.43.OA.C.7 · take

Build a number from digit conditions in order 4.NBT.A.2 · adapt

Compare numbers with an unknown digit 4.NBT.A.2 · take

Compare place by place to bound an unknown digit 4.NBT.A.2 · adapt

Find a number from digit clues 4.NBT.A.2 · take

Decompose a Number into Parts and Factors

Count groups several equivalent ways 2.OA.C.43.OA.A.1 · take

One number, many addition expressions 3.NBT.A.23.OA.A.4 · take

A number divides by its factor pieces 4.OA.B.44.NBT.B.6 · take

Different factor pairs, same product 3.OA.B.54.OA.B.4 · take

Recover Hidden Digits from Carries

Deduce missing digits in a multiplication 3.OA.C.73.NBT.A.3 · take

Fill long-division blanks from the known 3.OA.C.73.OA.B.6 · take

Recover hidden digits using regrouping 3.NBT.A.23.OA.A.42.NBT.B.7 · take

Recover missing digits from column carries 3.NBT.A.33.OA.B.5 · take

Deduce hidden digits from the ones place up 4.NBT.B.5 · take