解比例.1.5:12=6:x x: 3 5 = 5 6 :2 1.3 3.9 = 20 x
解比例.1.5:12=6:xx:35=56:21.33.9=20xx:247=0.875:523:56=x:0.5x0.15=0.40.03...
解比例.1.5:12=6:x x: 3 5 = 5 6 :2 1.3 3.9 = 20 x x: 24 7 =0.875:5 2 3 : 5 6 =x:0.5 x 0.15 = 0.4 0.03
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(1)1.5:12=6:x, 1.5x=12×6, 1.5x=72, 1.5x÷1.5=72÷1.5, x=48; (2)x:
2x=
2x=
2x÷2=
x=
(3)
1.3x=20×3.9, 1.3x=78, 1.3x÷1.3=78÷1.3, x=60; (4)x:
5x=
5x=3, 5x÷5=3÷5, x=0.6; (5)
x=
(6)
0.03x=0.15×0.4, 0.03x=0.06, 0.03x÷0.03=0.06÷0.03, x=2. |
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