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It is best to start practicing this with number lines. Start with positive number. if its a negative number, you go backwards.

If you have to combine, it is deemed addition. so lets say our positive is +7 and our negative is -9, the sum is +7+-9

The + and - may get confusing together. if you have ++ or -- together, this means +, and if you have +- or -+ together, these mean -.

So +7+-9 becomes +7-9, which counting back 9 (6,5,4,3,2,1,0,-1,-2) = -2

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11y ago

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It is best to start practicing this with number lines. Start with positive number. if its a negative number, you go backwards. If you have to combine, it is deemed addition. so lets say our positive is +7 and our negative is -9, the sum is +7+-9 The + and - may get confusing together. if you have ++ or -- together, this means +, and if you have +- or -+ together, these mean -. So +7+-9 becomes +7-9, which counting back 9 (6,5,4,3,2,1,0,-1,-2) = -2


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