ilyarocket124

Verified answer

Ответ:

5 4/7*2 2/13-1 2/5:1/2+2/15

1) 5 4/7*3 2/13=39/7*41/13=3/7*41/1=123/7=17 4/7

2) 1 2/5:1/2=7/5:1/2=7/5*2/1=14/5=2 4/5

3) 17 4/7-2 4/5=17 20/35-2 28/35=14 27/35

4) 14 27/35+2/15=14 81/105+14/105=14 95/105=14 19/21