5th Grade Math

Advanced operations, measurement, and data analysis for fifth grade students.

Multi-Digit OperationsMeasurement and ConversionsUnderstanding Data and Graphs
Order of Operations and ExpressionsDecimals and FractionsVolume and Geometry
Math in Cooking and BakingMoney and BudgetingPlanning Events Using Data
Showing Your WorkChecking for Reasonableness
Multi-Digit Operatio...Measurement and Conv...Understanding Data a...Order of Operations ...Decimals and Fractio...Volume and GeometryMath in Cooking and ...Money and BudgetingPlanning Events Usin...Showing Your WorkChecking for Reasona...
Study Strategies

Checking for Reasonableness

Make Sure Your Answers Make Sense

After solving a problem, always ask: does this answer seem right? Estimating before and after solving helps catch silly mistakes.

How to Check

  • Round numbers to make a quick estimate.
  • Compare your answer to your estimate.
  • If your answer is way off, try the problem again!

Examples

  • Estimate 199 + 202 as about 400, so the exact answer should be close.

  • Check if your answer for a measurement is bigger or smaller than the objects involved.

Checking for Reasonableness - 5th Grade Math Content | Practice Hub