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Subtracting Integers Algebraically. How to Subtract Integers Algebraically 1.Rewrite the problem  Keep the first number the same  Change the problem.

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Presentation on theme: "Subtracting Integers Algebraically. How to Subtract Integers Algebraically 1.Rewrite the problem  Keep the first number the same  Change the problem."— Presentation transcript:

1 Subtracting Integers Algebraically

2 How to Subtract Integers Algebraically 1.Rewrite the problem  Keep the first number the same  Change the problem from subtraction to addition  Make the last number its opposite 2.Now follow adding integer rules  Same sign – add the numbers keep the sign  Different signs – subtract the numbers, keep the sign of the greater absolute value

3 Examples 1. -7 – 14 -7 + -14 -21 2.13 – 19 13 + -19 -6 Rewrite the problem Add the numbers and keep the sign Rewrite the problem Subtract the numbers and keep the sign of the greater absolute value

4 Practice Problems 1.-15 – 3 2.10 – 20 3.15 - -7 4.-23 - -10 5.9 – 13 6.-4 - - 13 7.-7 - 18 Rewrite the problem. Then follow addition rules for integers. = -18 = -10 = 22 = -13 = -4 = 9 = -25

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