计算5.38乘4.9加6.6乘5.38减5.39除以3分之2

问题描述:

计算5.38乘4.9加6.6乘5.38减5.39除以3分之2

5.38×4.9+6.6×5.38-5.38÷2/3
=5.38×4.9+6.6×5.38-5.38×1.5
=5.38×(4.9+6.6-1.5)
=5.38×10
=53.8