Question

г) 7 2/7 + 1 3/7 - 2 1/7 помогите

Answer 1

Пошаговое объяснение:

$1)7 \frac{2}{7} + 1 \frac{3}{7} = 8 + \frac{2}{7} + \frac{3}{7} = 8 + \frac{2 + 3}{7} = 8 + \frac{5}{7} = 8 \frac{5}{7}$

$2)8 \frac{5}{7} - 2 \frac{1}{7} = \frac{5 + 8 \times 7}{7} - \frac{1 + 2 \times 7}{7} = \frac{61}{7} - \frac{15}{7 } = \frac{61 - 15}{7} = \frac{46}{7} = \frac{6 \times 7 + 4}{7} = 6 \frac{4}{7}$