题目内容
【题目】计算下面各题.
91÷4÷2.5 (0.32+6.4)÷0.8
12.8÷[(19.8-16.6)÷1.6] 4.8÷[(7.5-5.1)×0.2]
【答案】9.1;8.4;6.4;10
【解析】
91÷4÷2.5
=91÷(4×2.5)
=91÷10
=9.1
(0.32+6.4)÷0.8
=0.32÷0.8+6.4÷0.8
=0.4+8
=8.4
12.8÷[(19.8-16.6)÷1.6]
=12.8÷(3.2÷1.6)
=12.8÷2
=6.4
4.8÷[(7.5-5.1)×0.2]
=4.8÷(2.4×0.2)
=4.8÷0.48
=10
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