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


过程 急急急急急急急急急急急急
(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)亏笑巧 2:125=x:升橘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/销键2.8
x=0.2