题目内容
1-(
-
)-(
-
)-(
-
)-(
-
).
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分析:先去掉小括号,然后把相减为0的算式结合在一起,进而化简求解,去括号时注意:括号前边的运算是减法,去掉括号要改变运算符号.
解答:解:1-(
-
)-(
-
)-(
-
)-(
-
),
=1-
+
-
+
-
+
-
+
,
=(1-
)+(
-
)+(
-
)+(
-
)+
,
=
+0+0+0+
,
=
.
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=1-
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=(1-
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=
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=
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点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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