Addition of Integers.pptx

math 6

1. Operations on Integers

2. Addition of Integers with like Signs To add integers with like signs, ignore first the signs and add as in whole numbers. Then copy the common sign for the sum. Ex: -4 + (-2) = -6 -5 + (-23) = -28 - 10 + (-3) = -13 -7 + (-6) = -13

3. Try this: -16 + (-23) = -50 + (-275) = -85 + (-756) =

4. Addition of Integers with Unlike Signs To add integers with unlike signs, ignore first the signs and subtract as in whole numbers. Then copy the sign of the bigger addend for the sum. Ex: -8 + 3 = -5 12 + (-4) = 12 4 + (-6) = -2

5. When adding more than two addends, add those with like signs, then follow the rules in adding integers with unlike signs. Ex: -5 + (-6) + 3 = -11 + 3 = -8 15 + (-6) +7 + (-2) = 22 + (-8) = 14

6. Try this: 4 + (-9) = -5 + 6 = - 52 + 16 + 7 = 4 + (-8) + (-5) =

7. Subtraction of Integers To subtract an integer from another number, you can add its opposite to the number. Ex: -5 - 6 = -5 + (-6) = -11 8 – 5 = 8 + (-5) = 3

8. Try This: -7 – 6 = 12 - 25 = -15 -10 =