Question

Найти значение выражения 1/2+3/5-2/3 , 5/9+1/6+3/4 , 1/4+1/5-3/10

Answer 1

1/2+3/5-2/3=
1/2+3/5=11/10
11/10-2/3=13/30

5/9+1/6+3/4=
5/9+1/6=13/18
13/18+3/4=53/36

1/4+1/5-3/10=
1/4+1/5=9/20
9/20-3/10=3/20