脱式计算:0.75×18÷0.157.28+3.2÷2.52.05÷0.82+33.61.08×0.8÷0.2721.36÷0.8-12.94.28÷0.9÷4.1.

发布时间:2020-07-31 06:54:01

脱式计算:0.75×18÷0.157.28+3.2÷2.52.05÷0.82+33.61.08×0.8÷0.2721.36÷0.8-12.94.28÷0.9÷4.1.

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解:
(1)0.75×18÷0.15,
=13.5÷0.15,
=90;

(2)7.28+3.2÷2.5,
=7.28+1.28,
=8.56;

(3)2.05÷0.82+33.6,
=2.5+33.6,
=36.1;

(4)1.08×0.8÷0.27,
=0.864÷0.27,
=3.2;

(5)21.36÷0.8-12.9,
=26.7-12.9,
=13.8;

(6)4.28÷0.9÷4.1,
≈4.76÷4.1,
≈1.16.
解析分析:(1)按照从左向右的顺序进行计算;(2)先算除法,再算加法;(3)先算除法,再算加法;(4)按照从左向右的顺序进行计算;(5)先算除法,再算加法;(6)按照从左向右的顺序进行计算.

点评:根据题意,先找请运算顺序,然后再进一步计算,能简算的要简算.
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