40-(3.5-2.75) 5.8+0.2-5.8+0.2 简便计算
问题描述:
40-(3.5-2.75) 5.8+0.2-5.8+0.2 简便计算
答
=40+(-3.5+2.75-1)5.8+0.4=40-1.75×5.8+0.4=
40-(3.5-2.75) 5.8+0.2-5.8+0.2 简便计算
=40+(-3.5+2.75-1)5.8+0.4=40-1.75×5.8+0.4=