六年级下册解比例练习题.doc

六年级下册解比例练习题解比例x:10=: 0.4:x=1.2:2 = :=:x 0.8:4=x:8 :x=3:12 1.25:0.25=x:1.6 = = x: =6: = 45:x=18:26 2.8:4.2= 2.8:4.2=x:9.60642.4x 6x5(1)3(1) 12(0.6)x(1.5) 4(3)2(1)x5(4) 12(11)5(4)36(25)x x:10=: 0.4:x=1.2:2 =:=:x 0.8:4=x:8 :x=3:121.25:0.25=x:1.6 = =x: =6: = 45:x=18:26 2.8:4.2=x:9.6 :x=: 2.8:4.2=x:9.6 x:24= : 8:x=: :=x: 0642.4x 6x x x x0.71050x40 1.3x5.220 x3.6618 x 10：X=150:20 x:0.15=3.6:0.93.5/x=8/9 1/10:x=1/5:1/41/2:1/5=1/4:x 1/3:1/4=1/5:x X:0.5=40:0.25 4.5/1.5=x/32