| A | B |
|---|
| Grouping property of Addition | The property which states that the way addends are grouped does not change the sum. |
| estimate | to find about how much |
| expression | part of a number sentence - does not have an equal sign |
| difference | the answer in a subtraction problem |
| sum | the answer in an addition problem |
| addends | any of the numbers that are added |
| regroup | to exchange amounts of equal value to remnme a number |
| rounding | One way to estimate |
