4.375-【4.15-2.625】简便计算 快

问题描述:

4.375-【4.15-2.625】简便计算 快

4.375-【4.15-2.625】
=(4.375+2.625)-4.15
=7-4.15
=2.75

4.375-【4.15-2.625】简便计算 快
=4.375-4.15+2.625
=4.375+2.625-4.15
7-4.15
=2.85