Question

13\4*2 4\7: 4 1\2+2 2\5: 8\10*3\8 по действиям 40

Answer 1

$1 \frac{3}{4}*2 \frac{4}{7}:4 \frac{1}{2}+2 \frac{2}{5}: \frac{8}{10}* \frac{3}{8}=2 \frac{1}{8}$ 
$1)1 \frac{3}{4}*2 \frac{4}{7}= \frac{7}{4}* \frac{18}{7}= \frac{18}{4}$ 
$2) \frac{18}{4}:4 \frac{1}{2}= \frac{18}{4}: \frac{9}{2}= \frac{18}{4}* \frac{2}{9}= \frac{18*2}{4*9}=1$  
$3) 2 \frac{2}{5}: \frac{8}{10}= \frac{12}{5}* \frac{10}{8}= \frac{12*10}{5*40}=3$ 
$4)3* \frac{3}{8}= \frac{3*3}{8}= \frac{9}{8}=1 \frac{1}{8}$ 
$5)1+1 \frac{1}{8}=2 \frac{1}{8}$