Question

Вычислите:
2целых2/5-(1/4+7/10);
9целых-(15/8+3/20)
3целых-(1/6+2/3)
помогите решить

Answer 1

2 2/5-(1/4+7/10)=2 4/10-1/4-7/10=1 7/10-1/4=1,7-0,25=1,45
9-(15/8+3/20)=9- 15/8-3/20=9- 1 7/8-3/20=8-7/8-3/20=8-35/40-6/40=8-41/40=
  =8-1 1/40 =7-1/40=6 39/40
3-(1/6+2/3)=3-(1/6+4/6)=3-5/6=2 1/6