题目内容
1.4×0.8=14×8÷
100
100
.分析:把1.4×0.8理解为1.4×0.8÷1,然后根据商不变性质:被除数和除数同时扩大或缩小相同的倍数,商不变,由此推导即可得出答案.
解答:解:1.4×0.8,
=1.4×0.8÷1,
=(1.4×0.8×100)÷(1×100),
=(1.4×0.8×10×10)÷100,
=[(1.4×10)×(0.8×10)]÷100,
=14×8÷100;
故答案为:100.
=1.4×0.8÷1,
=(1.4×0.8×100)÷(1×100),
=(1.4×0.8×10×10)÷100,
=[(1.4×10)×(0.8×10)]÷100,
=14×8÷100;
故答案为:100.
点评:此题考查了对商不变性质的理解和应用,能灵活掌握商不变性质是解答此题的关键.
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