Question

0,4-+8(5-0,8*5/8)-5: 2 1/2 (дробная черта) (1 7/8*8-(8,9-2,6: 2/3))*34 2/5

Answer 1

$\frac{0,4+8*(5-0,8* \frac{5}{8})-5:2 \frac{1}{2} }{(1 \frac{7}{8}*8-(8,9-2,6: \frac{2}{3}))*34 \frac{2}{5} }=0,1$
1.$0,8* \frac{5}{8}= \frac{4}{8}= \frac{1}{2}=0,5$
2.$5-0,5=4,5$
3.$8*4,5=36$
4.$5:2 \frac{1}{2}=5: \frac{5}{2} = \frac{5*2}{5}=2$
5.$0,4+36=36,4$
6.$36,4-2=34,4$
7.$2,6: \frac{2}{3}=2 \frac{6}{10}: \frac{2}{3}= \frac{26}{10}: \frac{2}{3}= \frac{26*3}{10*2}= \frac{39}{10}=3,9$
8.$8,9-3,9=5$
9.$1 \frac{7}{8}-8= \frac{15}{8}*8=15$
10.$15-5=10$
11.$10*34 \frac{2}{5}= \frac{10}{1}* \frac{172}{5}=344$
12.$34,4:344=0,1$