19-09-2015
Mathematics

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how to solve 7+(-15)+12

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RedRicin RedRicin

19-09-2015

7+(-15)+12
Adding a negative number is the same as simply subtracting it.
7-15+12
7 - 15 = negative 8 (use a number line)
-8 + 12 = 4 (use a number line)

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Exvited Exvited

19-09-2015

7 + (-15) + 12

First, simplify brackets. / Your problem should look like: 7 - 15 + 12.
Second, simplify. / Your problem should look like: 4.

Answer: 4

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