题目内容
(1+
)÷(
-1)×
+|
-2|.
| 1 |
| 3 |
| 1 |
| 3 |
| 3 |
| 8 |
| 3 |
| 4 |
分析:先计算括号得到原式=
÷(-
)×
+|-
|,把除法转化乘法得到原式=
×(-
)×
+
,再进行乘法运算得到原式=-
+
,最后进行加减运算即可.
| 4 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 4 |
| 4 |
| 3 |
| 3 |
| 2 |
| 3 |
| 8 |
| 5 |
| 4 |
| 3 |
| 4 |
| 5 |
| 4 |
解答:解:原式=
÷(-
)×
+|-
|
=
×(-
)×
+
=-
+
=
.
| 4 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 4 |
=
| 4 |
| 3 |
| 3 |
| 2 |
| 3 |
| 8 |
| 5 |
| 4 |
=-
| 3 |
| 4 |
| 5 |
| 4 |
=
| 1 |
| 2 |
点评:本题考查了有理数的混合运算:先进行乘方或开方运算,再进行乘除运算,最后进行加减运算;把除法运算通过除法法则转化为乘法运算.
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