题目内容
对有理数a、b,规定运算如下:a※b=
+
,则-2.5※2=______.
| 1 |
| a |
| 1 |
| b |
∵a※b=
+
,
∴-2.5※2=-
+
=-
+
=
.
故答案为
.
| 1 |
| a |
| 1 |
| b |
∴-2.5※2=-
| 2 |
| 5 |
| 1 |
| 2 |
| 4 |
| 10 |
| 5 |
| 10 |
| 1 |
| 10 |
故答案为
| 1 |
| 10 |
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| a |
| 1 |
| b |
| 1 |
| a |
| 1 |
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