分析:先算括号里面的,再算括号外面的,能简算的要简算.
解答:解:17÷51+(
+
)×17,
=
+
×17+
×17,
=
+
+
,
=1
.
| 1 |
| 68 |
| 2 |
| 51 |
=
| 1 |
| 3 |
| 1 |
| 68 |
| 2 |
| 51 |
=
| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
=1
| 1 |
| 4 |
点评:此题考查在一个有括号的混合运算中,要先算括号里面的,简算的要简算.
| 1 |
| 68 |
| 2 |
| 51 |
| 1 |
| 68 |
| 2 |
| 51 |
| 1 |
| 3 |
| 1 |
| 68 |
| 2 |
| 51 |
| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |