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МатематикаВопрос:
1\(\frac{2}{7}\)・1\(\frac{1}{4}\)=1\(\frac{4}{28}\)
Ответ:
$$1 \frac{2}{7} \cdot 1 \frac{1}{4} = \frac{1 \cdot 7 + 2}{7} \cdot \frac{1 \cdot 4 + 1}{4} = \frac{9}{7} \cdot \frac{5}{4} = \frac{45}{28} = 1 \frac{17}{28}$$
Ответ: $$1 \frac{17}{28}$$
Похожие
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