Question

$4 \frac{21}{39 } - 3 \frac{4}{36}$
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Answer 1

Ответ:

$\frac{4*39+21}{39} -\frac{3*36+4}{36}=\frac{177}{39}  -\frac{112}{36}=\frac{177*36-112*39}{39*36}=\frac{167}{117}$

Пошаговое объяснение:

Answer 2

$4\frac{21}{39}-3\frac{4}{36}=4\frac{7}{13}-3\frac{1}{9}=\frac{59}{13}-\frac{28}{9}=\frac{59\cdot 9-28\cdot 13}{13\cdot 9}=\frac{167}{117}=1\frac{50}{117}$