1,2,3,4 0.8,4,2.8,2 2.7,9,0.9,31,2,3,4 0.8,4,2.8,22.7,9,0.9,3这三组数哪一组能组成比例
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1,2,3,40.8,4,2.8,22.7,9,0.9,31,2,3,40.8,4,2.8,22.7,9,0.9,3这三组数哪一组能组成比例1,2,3,40.8,4,2.8,22.7,9,0.9,31
1,2,3,4 0.8,4,2.8,2 2.7,9,0.9,31,2,3,4 0.8,4,2.8,22.7,9,0.9,3这三组数哪一组能组成比例
1,2,3,4 0.8,4,2.8,2 2.7,9,0.9,3
1,2,3,4 0.8,4,2.8,2
2.7,9,0.9,3
这三组数哪一组能组成比例
1,2,3,4 0.8,4,2.8,2 2.7,9,0.9,31,2,3,4 0.8,4,2.8,22.7,9,0.9,3这三组数哪一组能组成比例
第三组
1,2,3,4 0.8,4,2.8,2 2.7,9,0.9,31,2,3,4 0.8,4,2.8,22.7,9,0.9,3这三组数哪一组能组成比例
习题2.8 -2/3+(-1/6)-(-1/4)-1/2
箅出比值 0.4:0.8 1/3:1/4 80:24 2.8:4/5
(-1)×2×(-3)×4 (-12)×(-1.25)×(-3分之1)×0.8
四道简算题7.2×10.213又2/13 - 2.25 - 7又3/4(5又5/9 - 0.8 + 2又4/9) × 12.52.25 × 7又1/5 + 2.8 除以 4/9【简算,】
2.8除5分之4乘3又2分之1减7分之4等于?
-25-[-16+(1-0.8×3/4)÷(-2)]
3/5x-1/6=2/3 2x+0.8=4 0.4x(x-1.2)=1.2 10/9x-1/3x=21 3/4x-1/2=1/4 5(x-2.8)=140 x-3/7x=8/213/5x-1/6=2/3 2x+0.8=40.4x(x-1.2)=1.210/9x-1/3x=213/4x-1/2=1/4 5(x-2.8)=140x-3/7x=8/21方程和计算
-2^2÷(-4)^3+ |0.8-1|×(-2又1/2)^2
2x/3+1/4≥1/2(0.8+x/3)-1/3(x-3)
脱式计算:1.(1/7-1/9)×63-2/3 2.8/15×[3/4+(7/16-1/4)]
0.8*50x>0.7*50(x+4) 0.8*50x=0.7*50(x+4) 0.8*50x(1)0.8*50x>0.7*50(x+4)(2)0.8*50x=0.7*50(x+4)(3)0.8*50x
3分之4:1.6 1.5:45= 2:2.8= 3分之1:4分之1= 化简比
-2³÷4/9×(-2/3)²+(-0.8)-5×(-1/4)
简便运算:2.8*(4分之3-7分之2)
简便计算:2.8*(3/4-2/7)=?
4又1/2×[-9×(-1/3)的平方-0.8]÷(-5又1/4)
1/4乘0.8加1/2除3/4减0.8的简便算法简便算法哦