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