(1.5×0.9-1.15)÷2.5简便？
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(1.5×0.9-1.15)÷2.5
=(1.5×0.9-0.15-1)÷2.5
=(1.5×0.9-1.5×0.1-1)÷2.5
=[1.5×(0.9-0.1)-1]÷2.5
=[1.5×0.8-1]÷2.5
=[1.2-1]÷2.5
=0.2÷2.5
=0.08
=(1.5×0.9-0.15-1)÷2.5
=(1.5×0.9-1.5×0.1-1)÷2.5
=[1.5×(0.9-0.1)-1]÷2.5
=[1.5×0.8-1]÷2.5
=[1.2-1]÷2.5
=0.2÷2.5
=0.08
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