7.3除以4+2.7乘以0.25简算,要原因

问题描述:

7.3除以4+2.7乘以0.25简算,要原因

7.3÷4 + 2.7×0.25
=7.3×(1÷4) + 2.7×0.25
=7.3×0.25 + 2.7×0.25
=(7.3 + 2.7)×0.25
= 10×0.25
= 2.5