Question

1/2*4/5
7/10*1/10
1 1/5*1/2
3/2*2/3
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Answer 1

Пошаговое объяснение:

$\frac{1}{2} \times \frac{4}{5} = \frac{1 \times 4}{2 \times 5} = \frac{4}{10} = \frac{2 \times 2}{5 \times 2} = \frac{2}{5}$

$\frac{7}{10} \times \frac{1}{10} = \frac{7 \times 1}{10 \times 10} = \frac{7}{100}$

$1 \frac{1}{2} \times \frac{1}{2} = \frac{1 + 1 \times 2}{2} \times \frac{1}{2} = \frac{3}{2} \times \frac{1}{2} = \frac{3 \times 1}{2 \times 2} = \frac{3}{4}$

$\frac{3}{2} \times \frac{2}{3} = \frac{3 \times 2}{2 \times 3} = \frac{6}{6} = 1$