脱式计算,能简便的要简便计算.14-11.3-1.754÷2.5÷0.43.2×0.28+0.28×6.880.3-33.3×0.5÷0.37.

发布时间:2020-08-09 08:08:04

脱式计算,能简便的要简便计算. 14-11.3-1.754÷2.5÷0.43.2×0.28+0.28×6.880.3-33.3×0.5÷0.37.

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解:(1)14-11.3-1.7,
=14-(11.3+1.7),
=14-13,
=1;

(2)54÷2.5÷0.4,
=54÷(2.5×0.4),
=54÷1,
=54;

(3)3.2×0.28+0.28×6.8,
=(3.2+6.8)×0.28,
=10×0.28,
=2.8;

(4)80.3-33.3×0.5÷0.37,
=80.3-16.65÷0.37,
=80.3-45,
=35.3.
解析分析:(1)运用减法性质解答,
(2)运用除法性质解答,
(3)运用乘法分配律解答,
(4)按照先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序解答.

点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
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