(-0.5)+(+3.25)+(+2.75)+(-6.5)
(+0.5)+(-3.25)+(-2.75)+(+5.5)
-(+0.5)-(-3.25)+2.75-(+7.
(-0.5)-(-3.25)-2.75-(+7.5)怎么算
(-0.15)-(-3.25)+2.75—-(-7.5 )=?
简便计算 (5.75-3.25)\0.5+6.05
第一题:0.5+(-1/4)-(-2.75)+1/2
(-0.5)-(-3又4分之1)+2.75-(+7又2分之1)
(-0.5)+(3又1/4)+2.75+(-5又1/2) =
(-5 右2分之1)-(-2.75)+3 右4分之1+(-0.5)=?
(-0.5)-(—三又四分之一)+2.75-(+七又二分之一)=计算过程
-0.5-[-3.25]+2.75-7.5=
(6.8-5.4)* 2.75-0.9