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Topic 4
More Adding with Sums to 100
| Term | Definition |
|---|---|
| regroup | when you take 10 ones and make 1 ten or 1 ten and make 10 ones |
| partial sums | the sum of one place value when you add |
| compatible numbers | numbers that are easy to add or subtract using mental math |
| mental math | math you do in your head |