题目内容
(2012?西城区)
×[(0.4+
)÷
].
| 9 |
| 14 |
| 2 |
| 3 |
| 4 |
| 5 |
分析:先算小括号内的,再算中括号内的,最后算括号外的.
解答:解:
×[(0.4+
)÷
],
=
××[(
+
)÷
],
=
×[
÷
],
=
×[
×
],
=
×
,
=
.
| 9 |
| 14 |
| 2 |
| 3 |
| 4 |
| 5 |
=
| 9 |
| 14 |
| 2 |
| 5 |
| 2 |
| 3 |
| 4 |
| 5 |
=
| 9 |
| 14 |
| 16 |
| 15 |
| 4 |
| 5 |
=
| 9 |
| 14 |
| 16 |
| 15 |
| 5 |
| 4 |
=
| 9 |
| 14 |
| 4 |
| 3 |
=
| 6 |
| 7 |
点评:解答此题,注意运算顺序以及数字之间的转化.
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