(0.32÷16+1.08)÷224.5÷(0.75+1)8÷[(40.75-9.5)×0.4]+9.36100.6-45.75+29.4-14.251.25×.

发布时间:2020-08-09 02:11:37

(0.32÷16+1.08)÷224.5÷(0.75+1)8÷[(40.75-9.5)×0.4]+9.36100.6-45.75+29.4-14.251.25×.

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解:(1)(0.32÷16+1.08)÷22,
=(0.02+1.08)÷22,
=1.1÷22,
=0.05;

(2)4.5÷(0.75+1),
=4.5÷2,
=0.75;

(3)8÷[(40.75-9.5)×0.4]+9.36,
=8÷[31.25×0.4]+9.36,
=8÷12.5+9.36,
=0.64+9.36,
=10;

(4)÷7,
=×,
=()×,
=,
=;

(5)100.6-45.75+29.4-14.25,
=100.6-45.75-14.25+29.4,
=100.6-(45.75+14.25)+29.4,
=100.6-60+29.4,
=70;

(6)1.25×,
=1.25×0.8×,
=.
解析分析:(1)(2)(3)根据四则运算的计算法则进行计算,
(4)根据乘法分配律进行计算,
(5)根据一个数连续减两个数,等于减去这两个数的和,进行计算,
(6)根据乘法结合律进行计算.


点评:考查了运算定律与简便运算,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律简便计算.
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