What will my child learn in "Estimate and judge reasonableness"?

Use rounding and benchmark numbers to predict a reasonable result before or after solving exactly. This 4th Grade Math lesson builds the skill Choose and justify strategies in multi-step problems with a concept card and practice.

What grade level is "Estimate and judge reasonableness" for?

"Estimate and judge reasonableness" is a 4th Grade Math lesson in the Extension: Problem Solving unit, designed for students around ages 9-10.

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Estimate and judge reasonableness

~9 min

Use rounding and benchmark numbers to predict a reasonable result before or after solving exactly.

A student says 398 × 6 is about 2,500. Is that reasonable?

Choose the correct answer.