Question

5 2/7 • 1 1/4 +5 2/7 • 1 3/4
Помогите пж

Answer 1

$\displaystyle 5\frac{2}{7}*1\frac{1}{4}+5\frac{2}{7}*1\frac{3}{4}=\frac{37}{7}*\frac{5}{4}+\frac{37}{7}*\frac{7}{4}=\frac{185}{28}+37*\frac{1}{4}=\frac{185}{28}+\frac{37}{4}=\frac{111}{7}=15\frac{6}{7}$

Answer 2

Ответ:

$15 \frac{6}{7}$

Пошаговое объяснение:

$5 \frac{2}{7} \times 1 \frac{1}{4} + 5 \frac{2}{7} \times 1 \frac{3}{4} = 15 \frac{6}{7}$

$1) \: 5 \frac{2}{7} \times 1 \frac{1}{4} = \frac{37}{7} \times \frac{5}{4} = \frac{185}{28} = 6 \frac{17}{28}$

$2) \: 5 \frac{2}{7} \times 1 \frac{3}{4} = \frac{37}{7} \times \frac{7}{4} = \frac{37}{4} = 9 \frac{1}{4}$

$3) \: 6 \frac{17}{28} + 9 \frac{1}{4} = 6\frac{17}{28} + 9 \frac{7}{28} = 15 \frac{24}{28} = 15 \frac{12}{14} = 15 \frac{6}{7}$