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Adding Integers with Counters

Adding Integers with Counters. How to use counters. White counters represent positive numbers. Red or shaded counters represent negative numbers. Lay or draw counters out to represent all of the numbers in the problem. Pair up negative and positive counters

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Adding Integers with Counters

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  1. Adding Integers with Counters

  2. How to use counters • White counters represent positive numbers. • Red or shaded counters represent negative numbers. • Lay or draw counters out to represent all of the numbers in the problem. • Pair up negative and positive counters • When you pair up negative and positive counters, they are equal to zero. • These pairs are known as zero pairs. • Move any zero pairs that you have made off to the side. • Count up what you have left and that is your answer.

  3. -9 + 4 + 9 negative counters 4 positive counters Get rid of pairs. What do you have left? 5 negative counters Answer = -5

  4. 6 + -8 8 negative counters + 6 positive counters Get rid of pairs. What do you have left? 2 negative counters Answer = -2

  5. -2 + 16 16 positive counters 2 negative counters + Get rid of pairs. What do you have left? 14 positive counters Answer = 14

  6. 10 + -10 10 positive counters + 10 negative counters Get rid of pairs. What do you have left? 0 units Answer = 0

  7. -5 + -5 5 negative counters + 5 negative counters Get rid of pairs. What do you have left? 10 negative counters Answer = -10

  8. Try these problems using counters! 1. -7 + -5 = 2. -2 + 6 = 3. 8 + -5 = 4. -10 + 3 = 5. -13 + 6 = 6. -8 + 8 = 7. -13 + -4 = 8. -9 + 8 = 9. 10 + -15 = 10. 3 + -3 = 0 -12 -17 4 3 -1 -7 -5 0 -7

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