Question

Обчисли значення виразу
а) 7 3/5 : 9/10 б) 4 1/8 : 7 6/7 в) 10 4/5 : 5 1/7

Answer 1

$7 \frac{3}{5} \div \frac{9}{10} = \frac{38 \times 10}{5 \times 9} = \frac{38 \times 2}{1 \times 9} = \frac{76}{9} = 8 \frac{4}{9}$

$4 \frac{1}{8} \div 7 \frac{6}{7} = \frac{33 \times 7}{8 \times 55} = \frac{3 \times 7}{8 \times 5} = \frac{21}{40}$

$10 \frac{4}{5} \div 5 \frac{1}{7} = \frac{54 \times 7}{5 \times 36} = \frac{3 \times 7}{5 \times 2} = \frac{21}{10} =2 \frac{1}{10} = 2.1$