题目内容
-2
与|-1
|的和、积、差分别是
| 1 |
| 2 |
| 1 |
| 4 |
-1
,-
,-3
| 1 |
| 4 |
| 25 |
| 8 |
| 3 |
| 4 |
-1
,-
,-3
.| 1 |
| 4 |
| 25 |
| 8 |
| 3 |
| 4 |
分析:首先列出代数式,然后去掉绝对值符号,然后利用有理数的加减法则,以及乘法法则即可求解.
解答:解:-2
+|-1
|=-2
+1
=-1
;
-2
×|-1
|=-2
×1
=-
×
=-
;
-2
-|-1
|=-2
-1
=-3
.
故答案是:-1
,-
,-3
.
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 4 |
-2
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 5 |
| 2 |
| 5 |
| 4 |
| 25 |
| 8 |
-2
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
故答案是:-1
| 1 |
| 4 |
| 25 |
| 8 |
| 3 |
| 4 |
点评:本题考查了有理数的乘法,加减运算法则,正确理解法则是关键.
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