题目内容
直接写出得数
3×
=
×
=
×18=
×
=
÷
=
÷
=
÷
=
3×
=
3×
| 3 |
| 5 |
1
| 4 |
| 5 |
1
| 4 |
| 5 |
| 5 |
| 8 |
| 2 |
| 5 |
| 1 |
| 4 |
| 1 |
| 4 |
| 2 |
| 3 |
12
12
| 4 |
| 7 |
| 7 |
| 4 |
1
1
| 3 |
| 4 |
| 3 |
| 4 |
1
1
| 4 |
| 9 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 3 |
| 5 |
1
| 4 |
| 5 |
1
.| 4 |
| 5 |
分析:根据分数乘法、除法的计算法则直接进行口算.
解答:解:3×
=1
×
=
×18=12
×
=1
÷
=1
÷
=
÷
=
3×
=1
.
| 3 |
| 5 |
| 4 |
| 5 |
| 5 |
| 8 |
| 2 |
| 5 |
| 1 |
| 4 |
| 2 |
| 3 |
| 4 |
| 7 |
| 7 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 4 |
| 9 |
| 2 |
| 3 |
| 2 |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 1 |
| 2 |
| 3 |
| 5 |
| 4 |
| 5 |
点评:此题考查的目的是要求学生牢固掌握分数乘法、除法的计算法则,能够正确迅速地进行口算.
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