Key Idea1 of 3
Grouping to Estimate
Instead of counting one by one, make groups. See a pile of blocks? Imagine circling groups of 5. If you see about 3 groups of 5, your estimate is about 15. Grouping is a powerful estimation trick!
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Mathematics — Estimation: More or Less?
Instead of counting one by one, make groups. See a pile of blocks? Imagine circling groups of 5. If you see about 3 groups of 5, your estimate is about 15. Grouping is a powerful estimation trick!