题目内容
| 10 |
| 13 |
| 19 |
| 22 |
| 2 |
| 5 |
| 11 |
| 13 |
| 1 |
| 5 |
| 22 |
| 63 |
| 11 |
| 65 |
| 11 |
| 65 |
分析：本题可先将式中的带分数化为假分数，然后再根据交换律、分配律进行巧算．
解答：解：
÷2
-1
×
÷7+
×
=
÷
-
×
÷7+
×
，
=
×
-
÷ 7×
+
×
，
=（
+
）×
-
×
，
=
×
-
，
=
-
，
=
．
| 10 |
| 13 |
| 19 |
| 22 |
| 2 |
| 5 |
| 11 |
| 13 |
| 1 |
| 5 |
| 22 |
| 63 |
=
| 10 |
| 13 |
| 63 |
| 22 |
| 7 |
| 5 |
| 11 |
| 13 |
| 1 |
| 5 |
| 22 |
| 63 |
=
| 10 |
| 13 |
| 22 |
| 63 |
| 7 |
| 5 |
| 11 |
| 13 |
| 1 |
| 5 |
| 22 |
| 63 |
=（
| 10 |
| 13 |
| 1 |
| 5 |
| 22 |
| 63 |
| 1 |
| 5 |
| 11 |
| 13 |
=
| 63 |
| 65 |
| 22 |
| 63 |
| 11 |
| 65 |
=
| 22 |
| 65 |
| 11 |
| 65 |
=
| 11 |
| 65 |
点评：完成本题的关健是先将式中的带分数化为假分数，然后再进行巧算．
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