题目内容

31.7÷0.63(保留2位小数)   
2.4×1.5+3.6÷1.5
0.32×0.25+0.08÷4          
(9.6+1.48÷3.7)÷8
5.8÷[4×(1.34-0.14)]
5.4÷[0.51÷(1.2-1.03)].
分析:根据小数的四则混合运算进行解答即可得到答案.
解答:解:(1)31.7÷0.63≈50.32;

(2)2.4×1.5+3.6÷1.5
=3.6+2.4,
=6;

(3)0.32×0.25+0.08÷4 
=0.08+0.08÷4,
=0.08+0.02,
=0.08+0.02,
=0.1;

(4)(9.6+1.48÷3.7)÷8
=(9.6+0.4)÷8,
=10÷8,
=1.25;

(5)5.8÷[4×(1.34-0.14)]
=5.8÷[4×1.2],
=5.8÷4.8,
≈1.21;

(6)5.4÷[0.51÷(1.2-1.03)]
=5.4÷[0.51÷0.17],
=5.4÷3,
=1.8.
点评:此题主要考查的是小数的四则混合运算.
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