MCQ
$- 174 □ - 170 = - 174$ then the symbol in blank is:
- A$+$
- B$-$
- ✓$+$ or $-$
- DNone
$\frac{4}{-17}+\frac{0}{-17} =\frac{4}{-17}$
$\frac{4}{-17}-\frac{0}{-17}= \frac{4}{-17}$
Therefore we use both $+$ or $-$
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