(-0.5)-(-3又4分之1)+2.75-(+7又2分之1)
问题描述:
(-0.5)-(-3又4分之1)+2.75-(+7又2分之1)
答
-2
答
(-0.5)-(-3又4分之1)+2.75-(+7又2分之1)=(-0.5)-(-3.25)+2.75+7.5=13