题目内容
(
×3
+1
÷
)÷3
．
| 2 |
| 9 |
| 3 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
| 7 |
| 12 |
分析：先算括号内的乘法和除法，再算括号内的加法，最后算括号外的除法．
解答：解：（
×3
+1
÷
）÷3
=（
×
+
×
）×
=（
+
）×
=
×
=
| 2 |
| 9 |
| 3 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
| 7 |
| 12 |
=（
| 2 |
| 9 |
| 15 |
| 4 |
| 9 |
| 5 |
| 5 |
| 4 |
| 12 |
| 43 |
=（
| 5 |
| 6 |
| 9 |
| 4 |
| 12 |
| 43 |
=
| 37 |
| 12 |
| 12 |
| 43 |
=
| 37 |
| 43 |
点评：此题主要考查分数四则混合运算的运算顺序和运算法则．
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