题目内容
| 3 |
| 4 |
| 2 |
| 5 |
| 4 |
| 9 |
分析：先算
与
的和，所得的和再乘上
即可．
| 3 |
| 4 |
| 2 |
| 5 |
| 4 |
| 9 |
解答：解：
（
+
）×
，
=
×
，
=
．
答：积是
．
（
| 3 |
| 4 |
| 2 |
| 5 |
| 4 |
| 9 |
=
| 23 |
| 20 |
| 4 |
| 9 |
=
| 23 |
| 45 |
答：积是
| 23 |
| 45 |
点评：根据题意，先弄清运算顺序，然后再列式解答．
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题目内容
| 3 |
| 4 |
| 2 |
| 5 |
| 4 |
| 9 |
| 3 |
| 4 |
| 2 |
| 5 |
| 4 |
| 9 |
| 3 |
| 4 |
| 2 |
| 5 |
| 4 |
| 9 |
| 23 |
| 20 |
| 4 |
| 9 |
| 23 |
| 45 |
| 23 |
| 45 |