题目内容
如果
※3=
×
×
,
※2=
×
;那么请你探究:
※3= ,
※4-
※4= .
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| 2 |
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| 2 |
| 1 |
| 3 |
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| 4 |
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| 7 |
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| 7 |
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| 8 |
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| 3 |
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| 2 |
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| 3 |
考点:定义新运算
专题:运算顺序及法则
分析:由
※3=
×
×
,
※2=
×
;归纳出※的运算规律,即从※前面的数开始乘,依次乘分母比前一个数大1的数,※后面的数是几就乘几个,据此解答即可.
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| 2 |
| 1 |
| 2 |
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| 4 |
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| 7 |
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| 7 |
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| 8 |
解答:
解:由分析可得:
※3
=
×
×
=
;
※4-
※4
=
×
×
×
-
×
×
×
=
-
=
;
故答案为:
;
.
| 1 |
| 3 |
=
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
=
| 1 |
| 60 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 6 |
=
| 1 |
| 120 |
| 1 |
| 360 |
=
| 1 |
| 180 |
故答案为:
| 1 |
| 60 |
| 1 |
| 180 |
点评:解答本题的关键是,由
※3=
×
×
,
※2=
×
;归纳出※的运算规律.
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| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 8 |
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