下面各题怎样简便就怎样算.8分之7×7+0.125÷7分之1 25分之1×(5分之2+10分之1)
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下面各题怎样简便就怎样算.

8分之7×7+0.125÷7分之1

=7/8×7+1/8×7

=(7/8+1/8)×7

=1×7

=7

25分之1×(5分之2+10分之1)

=1/25×1/2

=1/50

2-13分之6÷26分之9-3分之2

=2-4/3-2/3

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

=2-2

=0

15分之4×( 2分之1+0.8÷7分之8)

=4/15×(1/2+0.7)

=4/15×6/5

=8/25

3分之1÷9分之4+3分之1+4分之1

=3/4+1/4+1/3

=1+1/3

=1又1/3

5分之4÷8分之5-5分之1÷8分之5

=(4/5-1/5)÷5/8

=3/5÷5/8

=24/25