This unit on fractions allows for upper-aged elementary learners to explore ways to find the greatest common factor and least common multiple of two numbers. Ultimately, young mathematicians will be able to identify equivalent fractions,...

Complete this step by step lesson to estimate the sum and difference then test yourself.

Students can practice estimating sums to the nearest thousand in a series of self-check exercises and timed learning games.

[Free Registration/Login may be required to access all resource tools.] Round whole numbers in order to estimate sums and differences.

Improve your estimation and rounding skills with these interactive games that are challenging and fun. Excellent skills practice for rounding, estimating sums and differences, and front-end estimation. Links to lesson plans, teacher...

This site explains how to estimate sums by rounding whole numbers. Games and exercises are provided to practice the skill.