| A | B |
|---|
| number expression | a number or numbers together with operation symbols |
| simplify | carry as many operations as possible |
| parentheses | a pair of grouping symbols ( ); may also mean multiplication |
| equivalent | having the same value; equal |
| number equation | a statement that two number expressions are equal |
| number property | a fact that is true for all numbers |
| associative property of addition | more than two numbers can be added in groups of two in any order |
| associative property of multiplication | more than two numbers can be multiplied in groups of two in any order |
| commutative property of addition | two numbers can be added in any order |
| commutative property of multiplication | two numbers can be multiplied in any order |
| identity property of addtion | adding 0 to a number does not change the number |
| identity property of multiplication | multiplying a number by 1 does not change the number |
| multiplicative property of zero (the zero property) | a number multiplied by 0 is 0 |
| distributive property | to multiply a sum or difference by a number, multiply each number of the sum or difference |
| area | the number of square units needed to cover a closed figure |
| 2(30) | 60 |
| 5(70) | 5 X 70 |
| 324 X 567 | 567 X 324 |
| 2 X 3 + 2 X 5 | 2(3 + 5) |
| 12 minus 7 | 5 |
| 7 minus 12 | negative 5 |
| 10 divided by 5 | 2 |
| 5 divided by 10 | one half |
| 8 X 5 + 3 | 43 |
| 8 + 5 X 3 | 23 |
| 3(8 + 5) | 39 |
| 354 + 890 | 890 + 354 |
| (34 + 56) + 59 | 34 + (56 + 59) |
| 67 X (45 X 38) | (67 X 45) X 38 |
| 12 X 58 = 58 X ? | 12 |
| 35 + 563 = 563 + 35 | True |
| 56 divided by 67 = 67 divided by 56 | False |
| the area of a square having sides of 6 inches | 36 square inches |
| a rectangle with length of 5 and width of 7 units has an area of ? | 35 square units |
| 12 X ? = 0 | 0 |
| ? + 0 = 15 | 15 |
| ? X 0 = 0 | all numbers |
| 90 - 10 X 8 | 10 |
| (400 + 200) + 40 | 40 + 600 |
