4.5÷4+2.8×25%+2.7×0.25简便方法计算
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4.5÷4+2.8×25%+2.7×0.25
=4.5X(1/4)+2.8X(1/4)+2.7X(1/4)
=(1/4)X(4.5+2.8+2.7)
=(1/4)X10
=10/4
=2.5
=4.5X(1/4)+2.8X(1/4)+2.7X(1/4)
=(1/4)X(4.5+2.8+2.7)
=(1/4)X10
=10/4
=2.5
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