Question

Вычислите ДАЮ 10 БАЛЛОВ

Answer 1

Ответ:

$4 \frac{1}{13}$

Пошаговое объяснение:

$4 \frac{2}{7} \div 1 \frac{5}{21} + (4 \frac{3}{13} \times \frac{14}{15} - 3 \frac{1}{3}) = 4 \frac{1}{13}$

$1)4 \frac{3}{13} \times \frac{14}{15} = \frac{55}{13} \times \frac{14}{15} = \frac{11}{13} \times \frac{14}{3} = \frac{154}{39} = 3 \frac{37}{39}$

$2)3 \frac{37}{39} - 3 \frac{1}{3} = 3 \frac{37}{39} - 3 \frac{13}{39} = \frac{24}{39} = \frac{8}{13}$

$3)4 \frac{2}{7} \div 1 \frac{5}{21} = \frac{30}{7} \div \frac{26}{21} = \frac{30}{7} \times \frac{21}{26} = \frac{15}{1} \times \frac{3}{13} = \frac{45}{13} = 3 \frac{6}{13}$

$4)3 \frac{6}{13} + \frac{8}{13} = 4 \frac{1}{13}$