题目内容

5.简算下面各题
280÷35            480÷15÷2            4600÷25÷41400÷35           
810÷(27×3)1890÷(6×9)3735÷45           6400÷20÷4            
750÷(25×6)1344÷24         960÷(96×2)5600÷25÷4

分析 根据除法的运算的性质:a÷b÷c=a÷(bc),据此简算即可.

解答 解:280÷35 
=280÷7÷5
=40÷5
=8;

 480÷15÷2
=480÷(15×2)
=480÷30
=16;
 
 4600÷25÷4
=4600÷(25×4)
=4600÷100
=46; 
 
 1400÷35           
=1400÷7÷5
=200÷5
=40;

  810÷(27×3)
=810÷27÷3
=30÷3
=10;
 
 1890÷(6×9)
=1890÷6÷9
=315÷9
=35;

 3735÷45           
=3735÷5÷9
=747÷9
=83;

6400÷20÷4 
=6400÷(20×4)
=6400÷80
=80;

750÷(25×6)
=750÷25÷6
=30÷6
=5;

1344÷24         
=1344÷4÷6
=336÷6
=56;

960÷(96×2)
=960÷96÷2
=10÷2
=5;

5600÷25÷4
=5600÷(25×4)
=5600÷100
=56.

点评 此题考查的目的是理解掌握除法的运算性质及应用.

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