填空
(i) __ / (-9) = 5
(ii) 50/__ = -50
已知
i) ? / (-9) = 5
ii) 50/? = -50
待完成: 填空
解
i)$\frac{ ?}{-9} = 5$
$? = (-9) \times 5 = -45$
所以 $\frac{-45}{-9} = 5$
ii) $\frac{50}{?} = -50$
$? = \frac{50}{-50} = -1$
所以 $\frac{50}{-1} = -50$
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