Inequality Range Membership
Decide or count the whole numbers that satisfy 이상/이하/초과/미만 (greater/less than or equal, strictly greater/less) boundary conditions, often as the overlap of two ranges on a number line.
grade 6 ExpressionsNumber system systematicvisual
Progression (6)
g6 1. Overlap of two ranges on a number line ExpressionsNumber system
g6 2. Inclusive vs exclusive range boundaries ExpressionsNumber system
g6 3. Multiplying both sides keeps the inequality direction ExpressionsNumber system
g6 4. Find the number before it was rounded ExpressionsNumber systemBase-ten numbers
g6 5. Simplify the expression before comparing Number systemExpressions
g6 6. Rounding is an up or a down Number systemExpressionsBase-ten numbers
Bridges to competition (1)
Reasoning problems that extend this idea toward competition:
Fractions meeting given conditions Counting