Question

Выполните умножение- 1/3*2/7, 1/2*5/6, 8/9*3/5, 9/2*2/9, 3/7*2, 9*5/6, 3*1/60, 2/5*15, 2 1/3*2, 4*1 1/2 заранее !

Answer 1

$\frac{1*3}{2*7} = \frac{3}{14}$

$\frac{1*5}{2*6} = \frac{5}{12}$

$\frac{8*3}{9*5} = \frac{8*1}{3*5} = \frac{8}{15}$

$\frac{9*2}{2*9} = \frac{1*1}{1*1} =1$

$\frac{3}{7} *2 = \frac{3*2}{7*1} = \frac{6}{7}$

$9* \frac{5}{6} = \frac{9*5}{1*6} = \frac{3*5}{1*2} = \frac{15}{2} = 7 \frac{1}{2}$

$3* \frac{1}{60} = \frac{3*1}{1*60} = \frac{1*1}{1*20} = \frac{1}{20}$

$\frac{2}{5} *15 = \frac{2*15}{5*1} = \frac{2*3}{1*1} =6$

$2 \frac{1}{3} *2 = \frac{2*3+1}{3} * \frac{2}{1} = \frac{7*2}{3*1} = \frac{14}{3} = 4 \frac{2}{3}$

$4* 1 \frac{1}{2} = \frac{4}{1} * \frac{1*2+1}{2} = \frac{4*3}{1*2} = \frac{2*3}{1*1} =6$