An integer can be divisible by another integer, which is a multiple of another integer. For example, 15 can be divisible by 3 or 5, so 15 is a multiple of 3 and 5.
The quotient obtained by dividing one number by another. For example, a÷b=c, that is, A is a multiple of B, for example, A÷B=C, it can be said that A is C times that of B.
A number has countless multiples, which means that the set of multiples of a number is infinite. Note: you can't call a number a multiple alone, you can only say who is a multiple of who.
In mathematics, doubling means doubling the original number. For example, if the original number is 2, then doubling it means increasing 2, which means it becomes 4, which is exactly twice the original number.
Extended data:
Multiply of 7:
If one digit of an integer is truncated, subtract twice this digit from the rest. If the difference is a multiple of 7, the original number can be divisible by 7. If the difference is too big or it is not easy to see whether it is a multiple of 7 in mental arithmetic, the above-mentioned "truncation, multiplication, subtraction and difference test" process should be carried out until a clear judgment can be made.
For example, the process of judging whether 133 is a multiple of 7 is as follows: 13-3×2=7, so 133 is a multiple of 7; For another example, the process of judging whether 6 139 is a multiple of 7 is as follows: 6 13-9×2=595, 59-5×2=49, so 6 139 is a multiple of 7, and so on.
A multiple of 8
The last three digits of a number are multiples of 8, and this number is multiples of 8.
7256。 256÷8=32, which is a multiple of 8. 7256÷8=907
Multiply of 9
If the sum of the numbers of an integer is divisible by 9, then the integer can be divisible by 9.
Baidu encyclopedia-multiple