Estimating Sums

Examples, solutions, and videos to teach Grade 3 students how to estimate sums by rounding and by compatible numbers.

Rounding to Estimate Sums

Estimate Sums
How to estimate sums, by using “Compatible” numbers, and by Rounding?

Estimating Addition and Subtraction Problems
This video explains how to round whole numbers to estimate addition and subtraction problems.

Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

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