下面各题怎样计算简便就怎样算 4÷-÷4÷[-(+)]×24+÷(+)×+.
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解:(1)4÷-÷4,
=5-,
=4;
(2)÷[-(+)],
=÷[-],
=,
=1;
(3)×24+÷,
=()×24,
=1×24,
=24;
(4)(+)×+,
=×+×+,
=(),
=+1,
=1.
解析分析:(1)(2)依据四则运算顺序解答;(3)运用乘法分配律解答;(4)先运用乘法分配律,再依据加法性质解答.
点评:本题考查知识点:(1)按照四则运算顺序进行正确计算,(2)简便算法的正确运用.