Выполнить действие: 5/21*4 И 3/20:5. Created by angalena. matematika-ru

20:5...

арина7772

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5/21*4=5*4/21=20/21
3/20:5=3/20*5=3/100

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ДашаKOT а где расписанное решение?

ДашаKOT
$\frac{5}{21} \times 4 = \frac{5 \times 4}{21} = \frac{20}{21} \\ \\ \frac{3}{20} \div 5 = \frac{3}{20} \div \frac{5}{1} = \frac{3}{20} \times \frac{1}{5} = \frac{3}{20} \times \frac{1}{5} = \frac{3}{100} \\ \\ \frac{3 \times 1}{20 \times 5} = \frac{3}{100}$

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ДашаKOT опечатка. повторение 3/20 * 5

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