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1-0.6×0.8=
12.5-7.5+2.5=
0.8÷0.8-0.8=
5.5÷14×2.5=
77÷1000+0.23=
(2.04-0.14)÷0.19=
分析:根据小数四则混合运算的顺序,按照小数四则运算的计算法则脱式计算.
解答:解:(1)1-0.6×0.8,
=1-0.48,
=0.52;

(2)12.5-7.5+2.5,
=5+2.5,
=7.5;

(3)0.8÷0.8-0.8,
=1-0.8,
=0.2;

(4)5.5÷14×2.5,
=
11
28
×
5
2

=
55
56


(5)77÷1000+0.23,
=0.077+0.23,
=0.307;

(6)(2.04-0.14)÷0.19,
=1.9÷0.19,
=10;
点评:此题考查的目的是理解掌握小数四则混合运算的顺序以及小数四则运算的计算法则,并且能够正确熟练地进行计算.
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