解比例 (1) x:4.8=8:0.6( 2) 2:125=x:0.75 (3)0.4:9=1.2:x (4) 2.8:五分之四=0.7:x
人气:431 ℃ 时间:2020-03-27 12:43:06
解答
(1) x:4.8=8:0.6
x:4.8=4:0.3
0.3x=4.8×4
x=4.8×4÷0.3
x=64
( 2) 2:125=x:0.75
125x=2*0.75
125x=1.5
x=15÷1250
x=3/250
(3)0.4:9=1.2:x
0.4x=9*1.2
x=9*1.2/0.4
x=27
(4) 2.8:五分之四=0.7:x
2.8:0.8=0.7:x
2.8x=0.8*0.7
x=0.56/2.8
x=0.2
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