题目内容
| 13 |
| 4 |
| 1 |
| 6 |
分析:先把小数化成分数,再根据减法的性质进行计算.据此解答.
解答:解:
-2
-0.25,
=3
-2
-
,
=3
-
-2
,
=
.
| 13 |
| 4 |
| 1 |
| 6 |
=3
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 4 |
=3
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 6 |
=
| 5 |
| 6 |
点评:本题主要考查了学生在分数加减法运算中合理运用简便算法的能力.
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