Asked by kolo

calculate the following and show work

12-(-4)-9=
Answered by Ms. Sue
I'll be glad to check your answer.
Answered by tom
(-4)-9=5
12-5=7
Answered by Reiny
I don't like the way Tom did this

proper way:

12 - (-4) - 9
= 12 + 4 - 9
= 16 - 9
= 7
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