(6.125-2.75)-(1.25-0.875)简便
问题描述:
(6.125-2.75)-(1.25-0.875)简便
答
(6.125-2.75)-(1.25-0.875)=(6.125+0.875)-(1.25+2.75)=7-4=3
(6.125-2.75)-(1.25-0.875)简便
(6.125-2.75)-(1.25-0.875)=(6.125+0.875)-(1.25+2.75)=7-4=3