| A | B |
|---|
| area | The number of square units needed to cover a space. |
| associative property of multiplication | When multiplying, the grouping of factors does not change the product. e.g. (3x9)x2=54 3x(9x2)=54 |
| inverse operation | An operation that reverses another operation. |
| perimeter | The distance around a closed figure. |
| commutative property of addition | When adding, the order of the addends does not change the sum. e.g. 5+4=9 4+5=9 |
| identity property of multiplication | In multiplication, a number times 1 equals that number. e.g. 6x1=6 |
| zero property of multiplicaton | In multiplication, the product of a number and 0 is always 0. e.g. 8x0=0 |
| associative property of addition | When adding, the grouping of addends does not change the sum. e.g. (3+6)+4=13 3+(6+4)13 |
| commutative property of multiplication | When multiplying, the order of factors does not change the product. e.g. 2x5=10 5x2=10 |
| distributive property of multiplication | To multiply a sum by a number, you can multiply each addend by the number and add the products. e.g. 2x(6+3) 2x6+2x3= 18 |
| identity property of addition | When 0 is added to a number, the sum is the number. e.g. 0+6=6 |
