Question

Обчисліть 1) 3/20+7/15 2) 8 3/7- 4 2/5 3) 7/16*9/49 5) 6/35:48/49

Answer 1

1) 3/20+7/15=9/60+28/60=37/60

2) 8 3/7 - 4 2/5 = 4 1/35

3) 7/16*9/49 = 0,08035714285

4) 6/35 : 48/49 = (6*49) /(48/35) =(6*7*7)/(6*8*5*7) = 7/(5*8) = 7/40