计算:(+3)+(+4)= (-2)+(+8)= (-0.25)+(+0.75)= (-2)+(-5)= (-9)+(+
计算:(+3)+(+4)= (-2)+(+8)= (-0.25)+(+0.75)= (-2)+(-5)= (-9)+(+
计算下面各题,能简便计算的要简便计算.3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4 = =
计算:0.25^-2分之1+8^-3分之2=?
计算:1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+19/35=?计算[(5又1/4-4.2
计算㏒8^9除以㏒2^3=
(计算)3(2-m)+4,m=9
计算1+2+3+4+5+6.+998+999=?
计算:(-1)+2+(-3)+4+(-5).+(-99)+100=?
计算x-2/5x+120=3/4x
简便计算5/6-(3/4-1/2)=
计算 0.25*(-2.15)+0.75*(+3.15)/3=?
1/2÷4/5÷(2/9×3/8)=?简便计算