(1)(-4.25)×-()(2)(-7)+(-)-()(3)()×(-)(4)()×(5)(6).

发布时间:2020-08-07 07:41:48

(1)(-4.25)×-()
(2)(-7)+(-)-()
(3)()×(-)
(4)()×
(5)
(6).

网友回答

解:(1)(-4.25)×-(),
=(-4.25)×+1,
=-+1,
=-2;

(2)(-7)+(-)-(),
=(-7+2)-(1+),
=-4-2,
=-6;

(3)()×(-),
=(-)×(-),
=35.6;

(4)()×,
=1×-2,
=-2,
=-;

(5),
=,
=-28;

(6),
=5.2×(+4.625)-15.6,
=5.2×5-15.6,
=26-15.6,
=10.4.
解析分析:(1)(3)(4)依据四则运算计算方法即可解答,
(2)运用加法交换律和结合律解答,
(5)把繁分数的分子和分母化简即可解答,
(6)运用乘法分配律解答.

点评:本题考查知识点:(1)依据四则运算顺序正确进行计算,(2)正确运用简便方法解决问题.
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