题目内容
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
×
×
(判断对错)分析:按照从左到右的顺序依次计算即可.
解答:解:
+
-
+
=1-
+
=
+
=
.
故答案为:×.
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
=1-
| 1 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 3 |
=
| 4 |
| 3 |
故答案为:×.
点评:计算注意抓住运算顺序,不要被表面数字和符号迷惑.
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