1X=400,2x=1/3,3x=8,4x=1
求解以下四道简答题:25:x=1/4:4 x:1/2=0.8:1.2 x/36=2/9 0.25
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1/2:1/5=1/4:x0.8:4=x:83/4:x=3:1236/x=54/32/9=8/x1.25:0.25=x:
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1.25x0.59x0.8简便算法.9.8x25 0.32x1.25 0.4x2.5x12.5x0.8
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(1)x+4.9= 49 (2)x-35.8= 4.5+7.6 (3)0.9x-9.2=8.8 (4)25x÷0.2=1
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9x²-256=0 4(2x-1)²=25 (2x+1)²-16=0
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解方程(1)4(x-1) 2 =9(2)x 2 +8x+15=0(3)25x 2 +10x+1=0(4)x 2 -3x+
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求未知数x. [5/6]x-0.4=3.4 4(x+0.2)=2.4 [5/8]:x=0.25:3 [1.25/0.25
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3.84:2.4=x:1/4 x:0.75=20.25:1/8 3.6:4/3=1.8:x x:0.75=2:1.25
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X-X/4+1/5X=95 1.25:0.25=X:3.2 4/9X+0.5=13/9X-1.3
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六年级数学题解比例:1.25:x=2.25:0.25 6:9/25=4/5:x 4/x+3=1/2 4/x+3=0.6/