Question

计算下面各题,能简算的要简算.25分之13—50分之13+5分之1

Answer 1

13/25-13/50+1/5

=13/50+1/5=23/50

3/4-(1/2+1/4)

=3/4-1/4-1/2

=0

7/16+9/20-5/16+11/20

=(7/16-5/16)+(9/20+11/20)

=1/8+1=9/8

1/10+3/8-2/5

=3/8+(1/10-2/5)

=3/8-3/10

=3/2×(1/4-1/5)=3/40