题目内容
脱式计算:
1.8-0.48÷1.6 | |
[(8.7-7.5)÷0.2]×0.15. |
解:(1)1.8-0.48÷1.6
=1.8-0.3,
=1.5;
(2)(-)×(÷)
=×,
=1;
(3)(+)×
=×,
=;
(4)÷[×(-)]
=÷[×],
=÷,
=2;
(5)(-+)÷
=(+)÷,
=÷,
=21;
(6)[(8.7-7.5)÷0.2]×0.15
=[1.2÷0.2]×0.15,
=6×0.15,
=0.9.
分析:根据分数、小数的四则混合运算进行计算即可.
点评:此题主要考查的是分数、小数的四则混合运算.
=1.8-0.3,
=1.5;
(2)(-)×(÷)
=×,
=1;
(3)(+)×
=×,
=;
(4)÷[×(-)]
=÷[×],
=÷,
=2;
(5)(-+)÷
=(+)÷,
=÷,
=21;
(6)[(8.7-7.5)÷0.2]×0.15
=[1.2÷0.2]×0.15,
=6×0.15,
=0.9.
分析:根据分数、小数的四则混合运算进行计算即可.
点评:此题主要考查的是分数、小数的四则混合运算.
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