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÷224.5÷(0.75+1)8÷[×0.4]+9.36100.6-45.75+29.4-14.251.25×.

编辑:chaxungu时间:2026-04-27 10:44:36分类:小学数学题库

(0.32÷16+1.08)÷22数学公式4.5÷(0.75+1数学公式8÷[(40.75-9.5)×0.4]+9.36
数学公式100.6-45.75+29.4-14.251.25×数学公式
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×
=
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.