math 9: integers- addition and subtraction

a) 5 + 11 = 16
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b) -5 + (-11) = -16
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c) -5 – (-11) = 6
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d) 5 – 11 = -6
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e) 5 – (-11)= 16
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f) -5 – 11 = -16
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g) -5 + 11= 6

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A) and E), B) and F), and C) and G) are equivelant.  These pairs have the same answer because though their equations were originally different, when the “do the opposite” factor came into play they basically became the same.

In this activity, I gained a deeper knowledge of why we follow certain steps/rules to get our answer.

Students need to know that using a visual strategy to assist with their calculations will greatly improve their understanding of integers.

One thought on “math 9: integers- addition and subtraction

  1. Bree,
    In your photos I liked how you stacked you counters on top of each other to make zero pairs, I didn’t even think about doing it that way. I agree with you on the last part because I think that using visual strategies does help.

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