【10分之7+6分之1+30分之11】×30
=10分之7×30+6分之1×30+30分之11×30
=21+5+11
=37
87.45×1.01-87.45
=87.45×(1.01-1)
=87.45×0.01
=0.8745
6.07×89+60.7×1.1
=6.07×89+6.07×11
=6.07×(89+11)
=6.07×100
=607
【10分之7+6分之1+30分之11】×30
=10分之7×30+6分之1×30+30分之11×30
=21+5+11
=37
87.45×1.01-87.45
=87.45×(1.01-1)
=87.45×0.01
=0.8745
6.07×89+60.7×1.1
=6.07×89+6.07×11
=6.07×(89+11)
=6.07×100
=607