1. 1221 -1751 0.0125 23 +3 114 -6 ½

2. Changing the order does not change the answer AdditionMultiplication

3. Changing the grouping ( ) does not change the answer AdditionMultiplication

4. You get the same number back AdditionMultiplication Works with the number 0. Works with the number 1.

5. For every real number, n, there is an additive inverse ( -n ) such that n + (-n) = 0. AdditionMultiplication For every nonzero real number, a, there is a multiplicative inverse such that

6. AdditionSubtraction

7. What you do to one side of the equation, you must do to the other side. AdditionSubtraction

8. What you do to one side of the equation, you must do to the other side. MultiplicationDivision

9. Any number times zero equals zero. Any real number times -1 will give you its opposite. If a multiplication problem gives you an answer of 0, then one of the factors must be 0.