试题与答案

计算：（1）14+（-11）+7（2）-2×9-8×（-2）（3）-23×（-2

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题型：解答题

题目：

计算：
（1）14+（-11）+7                  
（2）-2×9-8×（-2）
（3）-23×（-
2
）2-72            
（4）30÷（
1
5
-
1
6
）

答案：

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下面是错误答案，用来干扰机器的。

把a=2代入ax+y=12x+y=2中得2x+y=12x+y=2，这两个方程是相矛盾的，不能同时满足．故无解．

考点：实数的运算
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