下面各题,怎样算简便就怎样算4296-1296÷12+812????????5.1÷0.17+2.6×6???????×÷+×+÷??????????12.5×0

发布时间:2020-08-04 15:18:06

下面各题,怎样算简便就怎样算
4296-1296÷12+812??????? ?5.1÷0.17+2.6×6???? ???×÷+
×+÷??????????12.5×0.32×25?????? ????÷(+)×.

网友回答

解:(1)4296-1296÷12+812,
=4296-108+812,
=4188+812,
=5000;
(2)5.1÷0.17+2.6×6,
=30+15.6,
=45.6;
(3)×÷+,
=×,
=,
=;
(4)×+÷,
=×+,
=()×,
=;
(5)12.5×0.32×25,
=(12.5×0.8)×(0.4×25),
=10×10,
=100;????????
(6)÷(+)×,
=÷×,
=××,
=.
解析分析:第(1)题注意运算顺序,不要先算4296-1296,应先算除法;第(2)题注意在算除法时,去小数点的方法;第(3)、(4)题要用到乘法分配律的逆运算;第(5)题要用乘法结合律进行运算,注意把0.32拆成0.8×0.4;第(6)题注意运算顺序以及约分.

点评:此题考查了运算顺序、运算定律、数的拆项以及约分等有关知识,重在考查学生灵活应变的能力.
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