题目内容
| 16 |
| 17 |
| 9 |
| 16 |
| 13 |
| 17 |
| 7 |
| 16 |
| 4 |
| 17 |
分析:先去小括号,然后运用加法交换律计算,再算大括号里面的除法,最后算括号外的除法.
解答:解:
÷{
÷[
-(
-
)]},
=
÷{
÷[
-
+
]},
=
÷{
÷[
+
-
]},
=-
÷{
÷[1-
]},
=
÷{
÷
},
=
÷1,
=
.
| 16 |
| 17 |
| 9 |
| 16 |
| 13 |
| 17 |
| 7 |
| 16 |
| 4 |
| 17 |
=
| 16 |
| 17 |
| 9 |
| 16 |
| 13 |
| 17 |
| 7 |
| 16 |
| 4 |
| 17 |
=
| 16 |
| 17 |
| 9 |
| 16 |
| 13 |
| 17 |
| 4 |
| 17 |
| 7 |
| 16 |
=-
| 16 |
| 17 |
| 9 |
| 16 |
| 7 |
| 16 |
=
| 16 |
| 17 |
| 9 |
| 16 |
| 9 |
| 16 |
=
| 16 |
| 17 |
=
| 16 |
| 17 |
点评:完成本题要注意找出运算顺序,分析式中数据,运用合适的简便方法计算.
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