| Find the solution of the following without using number line. |
| (a) (+7) + (- 11) |
| (b) (- 13) + (+10) |
Answer:
(a) \[(+7)+(-11)\] \[=(+7)+(-7)+(-4)\]
\[=0+(-4)\]
\[=-4\]
(b) \[(-13)+(+10)\] \[=(-3)+(-10)+(+10)\]
\[=(-3)+0\]
\[=-3\].
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