题目内容

【题目】你能利用商不变的性质很快算出下面各题的商吗?

6300÷700 8100÷900 3000÷125

4800÷25 38700÷900 8000÷1600

【答案】9,9,24,192,43,5

【解析根据商不变性质:被除数和除数同时扩大或缩小相同的倍数(0除外),商不变;据此解答

解:6300÷700,

=(6300÷100)÷(700÷100),

=63÷7,

=9;

8100÷900,

=(8100÷100)÷(900÷100),

=81÷9,

=9;

3000÷125,

=(3000×8)÷(125×8),

=24000÷1000,

=24;

4800÷25,

=(4800×4)÷(25×4),

=19200÷100,

=192;

38700÷900,

=(38700÷100)÷(900÷100),

=387÷9,

=43;

8000÷1600,

=(8000÷100)÷(1600÷100),

=80÷16,

=5

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