4th Grade Math

Fractions, decimals, and geometric concepts for fourth grade students.

Understanding FractionsDecimals and Place ValueShapes and Geometry Basics
Equivalent FractionsAdding and Subtracting FractionsExploring 3D Shapes
Fractions and Decimals in CookingGeometry in Building and DesignMoney Matters: Decimals in Everyday Life
Break Down Big ProblemsCheck Your Work With Estimation
Understanding Fracti...Decimals and Place V...Shapes and Geometry ...Equivalent FractionsAdding and Subtracti...Exploring 3D ShapesFractions and Decima...Geometry in Building...Money Matters: Decim...Break Down Big Probl...Check Your Work With...
Study Strategies

Check Your Work With Estimation

Estimate your answer before solving the problem. This helps you know if your final answer makes sense. If your math answer is very different from your estimate, you may want to check your work again!

Examples

  • If you add 0.49 and 0.52, estimate the sum is about 1 before adding exactly.

  • If you find the area of a rectangle is 100, but your estimate was 20, check your calculations.