括号5.3乘3.75加3.75乘3.5括号再除以2.2
问题描述:
括号5.3乘3.75加3.75乘3.5括号再除以2.2
答
(5.3×3.75+3.75×3.5)÷2.2
=(5.3+3.5)×3.75÷2.2
=8.8×3.75÷2.2
=8.8÷2.2×3.75
=4×3.75
=15