题目内容
(1)求比值
(2)化简比
| 60:42 | 4.8:7.5 |
|
3.5:8
|
| 51:68 |
|
0.75:3.75 | 0.25:
|
60:42=60÷42=
;
4.8:7.5=(4.8×10)÷(7.5×10)=48÷75═
=
;
:
=
÷
=
;
3.5:8
=
:
=
÷
=
×
=
;
(2)51:68=(51÷17):(68÷17)=3:4;
=(72÷8):(16÷8)=9:2;
0.75:3.75=(0.75×100):(3.75×100)=75:375=1:5;
0.25:
=0.25:0.25=(0.25×100):(0.25×100)=1:1.
| 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 |
0.75:3.75=(0.75×100):(3.75×100)=75:375=1:5;
0.25:
| 1 |
| 4 |
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