MCQ
$\frac{-4}{7}​ □\frac{0}{9}=\frac{-4}{7}$​ then the answer is:
  • A
    $+$
  • B
    $-$
  • $+$ or $-$
  • D
    None of these

Answer

Correct option: C.
$+$ or $-$

$\frac{-4}{7}+\frac{0}{9}=\frac{-4}{7}$
$\frac{-4}{7}-\frac{0}{9}=\frac{-4}{7}$
Therefore we use both $+$ or $-$

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