Common Core: 5th Grade Math

Explore the foundational concepts of mathematics through engaging activities and problem-solving strategies designed for 5th graders.

Place Value and DecimalsAdding and Subtracting FractionsMultiplying and Dividing Whole Numbers
Operations with DecimalsVolume and MeasurementGraphing and Data Analysis
Budgeting with DecimalsMeasuring and Comparing VolumesCreating and Interpreting Graphs
Drawing Visual ModelsEstimating to Check Answers
Place Value and Deci...Adding and Subtracti...Multiplying and Divi...Operations with Deci...Volume and Measureme...Graphing and Data An...Budgeting with Decim...Measuring and Compar...Creating and Interpr...Drawing Visual Model...Estimating to Check ...
Study Strategies

Estimating to Check Answers

Quick Checks

Estimating means making a smart guess that's close to the actual answer. It helps you catch mistakes and work faster.

How to Estimate

  • Round numbers to the nearest 10, 100, or whole number
  • Do the math in your head for a quick check

Why Estimate?

  • Saves time
  • Lets you see if your answer makes sense before you finish the problem

Examples

  • Rounding $9.68 to $10 to see if you have enough money.

  • Estimating the answer to \( 198 + 203 \) by rounding to \( 200 + 200 = 400 \).