题目内容
5×
|
15×
|
10÷
| ||||||||||
|
(
|
| ||||||||||
|
|
1÷(1÷
|
分析:①②约分计算;③④⑥⑦把除法变为乘法,再计算;⑤0乘任何数都得0;⑧分子与分子相乘的积做分子,分母与分母相乘的积做分母;⑨先算括号内的,再算括号外的.
解答:解:①5×
=
②15×
=9
③10÷
=25
④
÷
=3
⑤(
-
)×0=0
⑥
÷3=
⑦
÷
=4
⑧
×
=
⑨1÷(1÷
)=
| 3 |
| 10 |
| 3 |
| 2 |
②15×
| 3 |
| 5 |
③10÷
| 2 |
| 5 |
④
| 3 |
| 7 |
| 1 |
| 7 |
⑤(
| 4 |
| 5 |
| 1 |
| 3 |
⑥
| 1 |
| 2 |
| 1 |
| 6 |
⑦
| 1 |
| 2 |
| 1 |
| 8 |
⑧
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 12 |
⑨1÷(1÷
| 1 |
| 4 |
| 1 |
| 4 |
点评:此题考查了分数的计算,根据题目特点,灵活解答.
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