题目内容
| 2 |
| 7 |
| 3 |
| 5 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
×
×
．（判断对错）分析：要想知道此题的对错，应计算出结果，再作判断．
解答：解：
+
×
，
=
+
，
=
；
故答案为：×．
| 3 |
| 7 |
| 3 |
| 5 |
| 2 |
| 3 |
=
| 3 |
| 7 |
| 2 |
| 5 |
=
| 29 |
| 35 |
故答案为：×．
点评：在计算时，应先算乘法，再算加法．
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