-2^3*-(-1)^5*(-2)^4=?0.25*(-2.15)+0.75*(+3.15)/3=?
计算 0.25*(-2.15)+0.75*(+3.15)/3=?
计算:(+3)+(+4)= (-2)+(+8)= (-0.25)+(+0.75)= (-2)+(-5)= (-9)+(+
解方程:5/6-x=1/2 x+0.75-3/5=0.25
化简下面各比.(1)0.48:0.32=?(2)0.25:0.75=?(3)0.32:0.16=?(4)4:3分之2=?
简便:(1)18÷0.75×0.75 (2)12.5×0.7×0.8 (3)0.25×4.35-0.25×0.35 =
3/8比1/3=x比1/6 0.75/x=0.25/3 8/9比0.2=x比1.5 1/2比1/5=1/4比x 1.25
(0.25)^(-2)+8^(2/3)-(1/16)^9-0.75)-lg25-2lg2=?
有一道找规律题:1.3/2=1*3 /2*1 2.15/4=3*5/2*2 3.35/6=5*7/2*3 4.63/8=
1.2(x-2)-3(4x-1)=9(1-x) 2.11x+64-2x=100-9x 3.15-(8-5x)=7x+(4
解方程 3分之1x+4分之1x=3分之2 x-0.75x-0.25=1 0.8x-14.7=1.3 1.2÷4分之x=5
拟合_洒驾问题已知时间:tdata=[0.25 0.5 0.75 1 1.5 2 2.5 3 3.5 4 4.5 5 6
1,4x+1.2*5=24.4 2,7(x+2.15)=56 3,(x-0.8)/3.1=4 解方程 加验算