填上合适的质数,91等于几乘几?

2024-11-17 12:56:40
推荐回答(5个)
回答1:

填上合适的质数,91等于7乘13,或13乘7

解析:91的因数有;1、7、13、91 

所以: 1×91=91 

91×1=91 

7×13=91 

13×7=91  

经过观察,符合质数要求的只有7×13=91 或13×7=91 

拓展资料: 

质数(prime number)又称素数,有无限个。一个大于1的自然数,除了1和它本身外,不能被其他自然数整除,换句话说就是该数除了1和它本身以外不再有其他的因数;否则称为合数。

根据算术基本定理,每一个比1大的整数,要么本身是一个质数,要么可以写成一系列质数的乘积;而且如果不考虑这些质数在乘积中的顺序,那么写出来的形式是唯一的。最小的质数是2。

回答2:

7乘13

回答3:

91=7X13

回答4:

7 和13

回答5:

13*7

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