题目内容

43.5×(7.8+8.2)
37.4÷8.5-9.6×0.25
71.4÷1.4÷300
(8.29×6.7-6.543)÷2.8
(5.4-5.4÷1.8)×3.5
4.7×(1.81-2.8÷3.5)
10.8÷[(5.38-1.78)×0.3]
[(2-0.91)×3-2.02]×8.
分析:根据四则混合运算的运算顺序:根据先算乘除,再算加减,有括号的,先算括号里的;据此依次解答即可.
解答:解:43.5×(7.8+8.2),
=43.5×16,
=696;

37.4÷8.5-9.6×0.25,
=4.4-2.4,
=2;

71.4÷1.4÷300,
=51÷300,
=0.17;

(8.29×6.7-6.543)÷2.8,
=49÷2.8,
=17.5;

(5.4-5.4÷1.8)×3.5,
=(5.4-3)×3.5,
=8.4;

4.7×(1.81-2.8÷3.5),
=4.7×(1.81-0.8),
=4.7×1.01,
=4.747;

10.8÷[(5.38-1.78)×0.3],
=10.8÷[3.6×0.3],
=10.8÷10.8,
=1;

[(2-0.91)×3-2.02]×8,
=[1.09×3-2.02]×8,
=1.25×8,
=10.
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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