Question

Выполните действие:а)2/3-1/5
б)1 1/5-3/4

Answer 1

2/3 - 1/5 = 10/15 - 3/15=7/15
6/5-3/4=24/20-15/20= 9/20

Answer 2

$\frac{2}{3} - \frac{1}{5} = \frac{2*5-1*3}{15} = \frac{10-3}{5} = \frac{7}{5} =1 \frac{2}{5}$

$1 \frac{1}{5} - \frac{3}{4} = \frac{6}{5} - \frac{3}{4} = \frac{6*4-3*5}{20} = \frac{24-15}{20} = \frac{9}{20}$