Lesson 3-1

Lesson 3-1 "Rounding and Estimating"
Part 1 "Rounding Decimals"

1. Review Place Values, EX: 1234.5678
2. Look Right, 5 or more up, less than 5 down

Part 2 "Estimating Sums and Differences"

3. The Symbol ≈ means "approximately"
4. Use the same Place Value, EX:
5. Front-End Estimate:
Use the Left Digit, Round the Rest, EX:
6. Clustering: Round All Data to One Value, EX:

This page was last modified 09/14/07