题目内容
解比例.
|
X:12=
|
|
| 21 |
| X |
| 32 |
| 8 |
32x=21×8
32x=168
x=
| 21 |
| 4 |
X:12=
| 7 |
| 4 |
2.8x=12×
| 7 |
| 4 |
2.8x=21
x=7.5;
| 1 |
| 20 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 20 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 80 |
x=
| 1 |
| 16 |
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题目内容
|
X:12=
|
|
| 21 |
| X |
| 32 |
| 8 |
| 21 |
| 4 |
| 7 |
| 4 |
| 7 |
| 4 |
| 1 |
| 20 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 20 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 80 |
| 1 |
| 16 |