(3.125-1.65)-(1.35-0.875)简便计算
问题描述:
(3.125-1.65)-(1.35-0.875)简便计算
答
(3.125-1.65)-(1.35-0.875)
=3.125-1.65-1.35+0.875
=3.125+0.875-1.65-1.35
=4-3=1