| A | B |
|---|
| Communitive property of addition | 4+3 = 3+4 |
| Communitive property of multiplication | 5x6 = 6x5 |
| associative property of addition | 4 + (3 + 2) = (4 +3) + 2 |
| associative property of multiplication | 5x(6x2) = (5x6)x2 |
| identity property of addition | 4.3 + 0 = 4.3 |
| identity property of multiplication | 5.6 x 1 = 5.6 |
| zero property | 4x0 = 0 |
| estimation by rounding | You round numbers to the nearest ones then add/sub or mult./div. |
| front end estimation | add or subtract ones column first |
| compatible numbers | used with division you find easy factors |
