1. Properties of Operations in Math Lesson 2

2. Inverse Operations Means: “putting together” a problem and “taking it apart” using the same numbers by + and – Example: 2 + 3 = 5 5 – 3 = 2 OR 5 – 2 = 3

3. Commutative Property of Addition Means: changing the order of problem doesn’t make the answer different Example: 5 + 6 = 11 6 + 5 = 11

4. Identity Property of Addition Means: when we add 0 with any given number, the answer will always be the given number Example: 2 + 0 = 2 0 + 15 = 15

5. Associative Property of Addition Means: we can “group” the numbers in any way and still get the same answer Example: (2 + 3) + 4 = 9 2 + (3 + 4) = 9 3 + (2 + 4) = 9

6. Property of Zero for Multiplication Means: when we multiply any number with 0, the answer will always be 0 Example: 15 x 0 = 0 (0)(125) = 0

7. Commutative Property of Multiplication Means: changing the order of problem doesn’t make the answer different Example: 7 · 3 · 2 = 42 2 · 7 · 3 = 42

8. Identity Property of Multiplication Means: when we multiply 1 with any given number, the answer will always be the given number Example: 12 (1) = 12 1 · 24 = 24

9. Associative Property of Multiplication Means: we can “group” the numbers in any way and still get the same answer Example: (1 x 3) · 2 = 6 3 · (2 · 1) = 6 1 x (2 x 3) = 6