Question

Помогите решить
$1 \frac{1}{4} \times 1 \frac{1}{5} + 1 \frac{1}{7} \times 1 \frac{1}{8}$
$12 \frac{4}{5} \times 3 \frac{3}{4} - 4 \frac{4}{11} \times 4 \frac{1}{8}$
$(3 \frac{1}{3} + 2 \frac{2}{1} ) + \times \frac{3}{7}$
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Answer 1

Ответ:

Пошаговое объяснение:

1) 1 1/4 * 1 1/5 = 5/4 * 6/5 = 3/2

2) 1 1/7 * 1 1/8 = 8/7 * 9/8 = 9/7

3) 3/2 + 9/7 = 21/14 + 18/14 = 39/14 = 2 11/14

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1) 12 4/5 * 3 3/4 = 64/5 * 15/4 = 48

2) 4 4/11 * 4 1/8 = 48/11 * 33/8 = 18

3) 48 - 18 = 30

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