问题 解答题
(1)求比值
60:424.8:7.5
3
8
9
20
3.5:8
2
5
(2)化简比
51:68
72
16
0.75:3.750.25:
1
4
答案

60:42=60÷42=

10
7

4.8:7.5=(4.8×10)÷(7.5×10)=48÷75═

48
75
=
16
25

3
8
9
20
=
3
8
÷
9
20
=
5
6

3.5:8

2
5
=
35
10
42
5
=
35
10
÷
42
5
=
35
10
×
5
42
=
5
12

(2)51:68=(51÷17):(68÷17)=3:4;

72
16
=(72÷8):(16÷8)=9:2;

0.75:3.75=(0.75×100):(3.75×100)=75:375=1:5;

0.25:

1
4
=0.25:0.25=(0.25×100):(0.25×100)=1:1.

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