Answers

  • Jyt
  • Ambitious
2014-06-17T17:20:21+08:00
Since I didn't get what you mean .. Here -.-
-27 + 15 = -12
Subtract if UNLIKE sign
Add if Same sign
Get the sign of bigger number
0
2014-06-17T19:59:37+08:00
/-27/ + /+15/ = /+12/

explaination:
the dots from left is the negative numbers, the dots in the right are the positive.
remove 15 dots from the negative and remove also 15 dots from the positive. then the remaining dots is 12. the dots are in the left so it is negative: /-12/
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