题目内容
1-(
-
)-(
-
)-(
-
)-(
-
).
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 24 |
| 1 |
| 24 |
| 1 |
| 48 |
分析:去括号,减号变为加号,加号变为减号,运用减法的性质简算.
解答:解:1-(
-
)-(
-
)-(
-
)-(
-
),
=1-
+
-
+
-
+
-
+
,
=
+
,
=
.
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 24 |
| 1 |
| 24 |
| 1 |
| 48 |
=1-
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 24 |
| 1 |
| 24 |
| 1 |
| 48 |
=
| 2 |
| 3 |
| 1 |
| 48 |
=
| 11 |
| 16 |
点评:在计算时,根据本题特点,先去括号,再进行计算.
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