题目内容
| 7 |
| 8 |
| 4 |
| 15 |
| 45 |
| 64 |
分析：先求出
乘
的积，再用
减所得的积即可解答．
| 4 |
| 15 |
| 45 |
| 64 |
| 7 |
| 8 |
解答：解：
-
×
，
=
-
，
=
，
答：差是
．
| 7 |
| 8 |
| 4 |
| 15 |
| 45 |
| 64 |
=
| 7 |
| 8 |
| 3 |
| 16 |
=
| 11 |
| 16 |
答：差是
| 11 |
| 16 |
点评：解答本题的关键是明确计算的顺序，关键是计算结果要准确．
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题目内容
| 7 |
| 8 |
| 4 |
| 15 |
| 45 |
| 64 |
| 4 |
| 15 |
| 45 |
| 64 |
| 7 |
| 8 |
| 7 |
| 8 |
| 4 |
| 15 |
| 45 |
| 64 |
| 7 |
| 8 |
| 3 |
| 16 |
| 11 |
| 16 |
| 11 |
| 16 |