题目内容
计算:3
×
-2÷1
.
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 5 |
分析:先把带分数化成假分数,在按照分数的四则混合运算规律计算,即可得解.
解答:解:3
×
-2÷1
,
=
×
-2÷
,
=2-2×
,
=2-
,
=
.
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 5 |
=
| 10 |
| 3 |
| 3 |
| 5 |
| 6 |
| 5 |
=2-2×
| 5 |
| 6 |
=2-
| 5 |
| 3 |
=
| 1 |
| 3 |
点评:此题重点要求同学们在含有带分数的计算中,一定把带分数化成假分数后,再进行计算.
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