题目内容
计算：
（1）(1-
+
)×(-48)
（2）-14-(1-0.5)×
×[2-(-3)2]．
（1）(1-
| 1 |
| 6 |
| 3 |
| 4 |
（2）-14-(1-0.5)×
| 1 |
| 3 |
（1）(1-
+
)×(-48)
=-48+
×48-
×48
=-48+8-36
=-76；
（2）-14-(1-0.5)×
×[2-(-3)2]
=-1-
×
×[2-9]
=-1+
×
×7
=-1+
=
．
| 1 |
| 6 |
| 3 |
| 4 |
=-48+
| 1 |
| 6 |
| 3 |
| 4 |
=-48+8-36
=-76；
（2）-14-(1-0.5)×
| 1 |
| 3 |
=-1-
| 1 |
| 2 |
| 1 |
| 3 |
=-1+
| 1 |
| 2 |
| 1 |
| 3 |
=-1+
| 7 |
| 6 |
=
| 1 |
| 6 |
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