题目内容

1÷11=0.0
?
9
   2÷11=0.
? ?
18
   3÷11=0.
? ?
27
    9÷11=0.
? ?
81
  10÷11=0.
?
9
?
0

请你根据所发现的有趣的现象找出规律,直接写出下面各题的得数.
4÷11=
5÷11=
6÷11=
7÷11=
8÷11=
15÷11=
26÷11=
37÷11=
分析:从上面的算式可以看出循环解都是两个数字,数字是9与被除数的乘积,被除数大于11时,是与余数的乘积;由此规律直接算出结果即可.
解答:解:4÷11=0.
?
3
?
6

5÷11=0.
?
4
?
5

6÷11=0.
?
5
?
4

7÷11=0.
?
6
?
3

8÷11=0.
?
7
?
2

15÷11=1.
?
3
?
6

26÷11=2.
?
3
?
6

37÷11=3.
?
3
?
6
点评:注意式子的运算结果中数字之间的联系,发现规律,进一步解决问题.
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3.6÷24= 0.8×1.1= 7.2+12.8= 46.7-3.8=
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10÷20= 24÷15= 8.65×10= 0.35×0.6=
3.08×0.01= 4.95×1000= 6.9×0.1= 0.4×0.5=
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3.9÷0.13 16.5÷0.5= 5×0.12= 24×0.5=
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84÷0.21= 0.75÷0.25= 2.5×16= 0.108÷2=
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