Add Subtract Positive Negative integers

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Presentation transcript:

Add Subtract Positive Negative integers by Matching

-1 + 1 = 0 N + P = 0

-6 + -8 = -14 8 + -5 = 3 N N P N P + N = 0 So we mark them out. We are then left with 3 Positive Count the total number of Ns which is 14

3 + -8 = -5 7 + -2 = 5 P N P N P + N = 0 So we mark P + N = 0 them out 3 + -8 = -5 7 + -2 = 5 P + N = 0 So we mark them out P N P + N = 0 So we mark them out. P N We are then left with 5 negatives We are then left with 5 Positive

______________________ Group Practice ______________________ Name Do together as class. Write the N for negative numbers and P for positive number. Mark out pairs and what is left is the answer. -7 + 5 = ____ 9 + -6 = ____ -8 + -8 = ____ 4 + -9 = ____

______________________ Group Practice ______________________ Name Do together as class. Write the N for negative numbers and P for positive number. Mark out pairs and what is left is the answer. -7 + 5 = ____ -2 9 + -6 = ____ -8 + -8 = ____ 4 + -9 = ____ N P

______________________ Group Practice ______________________ Name Do together as class. Write the N for negative numbers and P for positive number. Mark out pairs and what is left is the answer. -7 + 5 = ____ -2 9 + -6 = ____ -8 + -8 = ____ 4 + -9 = ____ N P P N 3

______________________ Group Practice ______________________ Name Do together as class. Write the N for negative numbers and P for positive number. Mark out pairs of positive and negative and what is left is the answer. -7 + 5 = ____ -2 9 + -6 = ____ -8 + -8 = ____ 4 + -9 = ____ N P P N N N 3 -16

______________________ Group Practice ______________________ Name Do together as class. Write the N for negative numbers and P for positive number. Mark out pairs of positive and negative and what is left is the answer. -7 + 5 = ____ -2 9 + -6 = ____ -8 + -8 = ____ 4 + -9 = ____ N P P N N P p N N 3 -16 -5

-6 + -8 = ______ -14 Rules for Adding Integers Alike: Add Keep the sign Different: Subtract take the large number sign -6 + -8 = ______ -14 N N Add them up because there are no pairs of positive and negative to mark out.

6 + -8 = ______ -2 P N Rules for Adding Integers Alike: Add Keep the sign Different: Subtract take the large number sign Subtract because you take away the pairs. What is left is the answer.

Matching Practice Name ______________________ Write the N for negative numbers and P for positive number. Mark out pairs and what is left is the answer. 1. -6 + 5 = ____ 2. -5 + 4 = ____ 3. 2 + -6 = ____ 4. -4 + -2 = ____ 5. -2 + 6 = ____ 6. 4 + -2 = ____ 7. 3 + -2 = ____ 8. -1 + 7 = ____ 9. 9 + -2 = ____ 10. 4 + -6 = ____ 11. 3 + -5 = ____ 12. 4 + -7 = ____ 13. 8 + -8 = ___ 14. -6 + 7 = ___ 15. 8 + -3 =___ 16. -5 + -3 = ___ 17. 5 + -1 = ___ 18. 3 + 9 = ___

______________________ Matching Practice ______________________ Name Write the N for negative numbers and P for positive number. Mark out pairs and what is left is the answer. 1. -6 + 5 = ____ 2. -5 + 4 = ____ 3. 2 + -6 = ____ 4. -4 + -2 = ____ 5. -2 + 6 = ____ 6. 4 + -2 = ____ - 7. 3 + -2 = ____ 8. -1 + 7 = ____ 9. 9 + -2 = ____ 10. 4 + -6 = ____ 11. 3 + -5 = ____ 12. 4 + -7 = ____ 13. 8 + -8 = ___ 14. -6 + 7 = ___ 15. 8 + -3 =___ 16. -5 + -3 = ___ 17. 5 + -1 = ___ 18. 3 + 9 = ___