Question

Выполните действия 31/60+[7/20+11/60]

Answer 1

31/60+(7/20+11/60) = 31/60+(21+11/60)= 31/60 + 32/60 = 63/60

1*1/20

Answer 2

31/70+(7/20+11/60)=41/42


1)7/20+11/60=21/60+11/60=32/60


2)32/60+31/70=224/420+186/420


3)224/420+186/420=410/420=41/42