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解比例 0.6:4.8=12:X23:14=1.2:X45:X=18:269:0.09=X:

2022-08-14 05:16:04 问答库 阅读 201 次

问题详情

解比例 0.6:4.8=12:X

2

3

:1

4

=1.2:X45:X=18:26

9:0.09=X:0.15x:1

20

=3

4

:1

5

(3.8-x):7=2:7

0.8

X

=7

5

x:5

7

=0.3:5

14

1.6

6

=X

2.4

0.375:X=1

20

:60%X:5=18

30

:1

2

1.4

x

=0.4

15

2

5

:X=0.25:60.45:X=2

7

:201.25:0.25=X:1.6

X:48=3:1.2

7

8

:X=1:0.25

1.6

X

=2.5

5

12:5=3.6:XX:0.25=4:31.5:X=3.6:4.8

6.5:X=31

4

:40.6:11

5

=4

5

:X1.5:3

4

=0.36:X

0.75:X=11

4

:23.6:X=0.48:3

25

1.25:0.2=X:13

5

参考答案

(1)0.6:4.8=12:X,
0.6X=4.8×12,
0.6X÷0.6=57.6÷0.6,
X=96;

(2)23:14=1.2:X,
23X=14×1.2,
23X÷23=0.3÷23,
X=0.45;

(3)45:X=18:26,
18X=45×26,
18X÷18=1170÷18,
X=65;

(4)9:0.09=X:0.15,
0.09X=0.15×9,
0.09X÷0.09=1.35÷0.09,
X=15;

(5)x:120=34:15,
15x:=120×34,
15x÷15=380÷15,
x=316;

(6)(3.8-x):7=2:7,
(3.8-x)×7=2×7,
(3.8-x)×7÷7=14÷7,
3.8-x=2,
3.8-x+x=2+x,
3.8=2+x,
3.8-2=2+x-2,
x=1.8;

(7)0.8X=75,
7X=0.8×5,
7X÷7=4÷7,
X=47;

(8)x:57=0.3:514,
514x=57×0.3,
514x÷514=314÷514,
x=35;

(9)1.66=X2.4,
6X=1.6×2.4,
6X÷6=3.84÷6,
X=0.64;

(10)0.375:X=120:60%,
120X=0.375×60%,
120X÷120=940÷120,
X=92;

(11)X:5=1830:12,
12X=5×1830,
12X÷12=3÷12,
X=6;

(12)1.4x=0.415,
0.4x=1.4×15,
0.4x÷0.4=21÷0.4,
x=52.5;

(13)25:X=0.25:6,
0.25X=25×6,
0.25X÷0.25=2.4÷0.25,
X=9.6;

(14)0.45:X=27:20,
27X=0.45×20,
27X÷27=9÷27,
X=31.5;

(15)1.25:0.25=X:1.6,
0.25X=1.25×1.6,
0.25X÷0.25=2÷0.25,
X=8;

(16)X:48=3:1.2,
1.2X=48×3,
1.2X÷1.2=144÷1.2,
X=120;

(17)78:X=1:0.25,
X=0.25×78,
X=732;

(18)1.6X=2.55,
2.5X=1.6×5,
2.5X÷2.5=8÷2.5,
X=3.2;

(19)12:5=3.6:X,
12X=5×3.6,
12X÷12=18÷12,
X=1.5;

(20)X:0.25=4:3,
3X=0.25×4,
3X÷3=1÷3,
X=13;

(21)1.5:X=3.6:4.8,
3.6X=1.5×4.8,
3.6X÷3.6=7.2÷3.6,
X=2;

(22)6.5:X=314:4,
314X=4×6.5,
314X÷314=26÷314,
X=8;

(23)0.6:115=45:X,
0.6X=115×45,
0.6X÷0.6=2425÷0.6,
X=85;

(24)1.5:34=0.36:X,
1.5X=34×0.36,
1.5X÷1.5=0.27÷1.5,
X=0.18;

(25)0.75:X=114:2,
114X=2×0.75,
114X÷114=1.5÷114,
X=1.2;

(26)3.6:X=0.48:325,
0.48X=3.6×325,
0.48X÷0.48=0.432÷0.48,
X=0.9;

(27)1.25:0.2=X:135,
0.2X=1.25×135,
0.2X÷0.2=2÷0.2,
X=10;

考点:比例