(-0.5)-9/2-(-19/2)+9.75
(-0.5)+(9/2)+(-19/2)+9.75=?
(-0.5)-9/2-(-19/2)+9.75
(-0.5)+9/2+(-19/2)+9.75
(-0.5)+2分之9+(-2分之19)+9.75
(-0.5)+(9/4)+(-19/2)+(9.75) 怎么算
数学计算题;(-0.5)+(9/2)+(-19/2)+9.75=?(-1/2)+(-2/5)+(3/2)+(18/5)+
运用有理数加法的运算律来计算:(1)(-0.5)+4分之17+(-2分之19)+9.75;(2)1又4分之3+(-6.5
9.75-15÷19-19分之2×2的简算方法
975乘0.25加9又2分之3乘76减9.75
(1) (-0.5)+(+4.5)+(-9.5)+9.75
(-0.5)+9/4+(-19/2)+9.25=?;(-4/5)+6=?
数学题 快来人啊2/5*7.6+0.4*0.4 9.75-5/7+1/4-2/74/9[3/4-(7/16-0.25)]