Question

Выполните действия дроби 31/60+(7/20+11/60)

Answer 1

31/60+(7/20+11/60)=1 1/20
1) 7/20+11/60=21+11/60=32/60=8/15
2) 31/60+8/16=33+31/60=63/60=21/20=1 1/20