Bottom area of cylindrical volume × height

Cone volume bottom area × height ÷3

prime number

Prime numbers are also called prime numbers. The number of prime numbers is infinite. Composite number: The divisor of a number has other divisors besides 1 and itself. This number is called a composite number. 2 is not a composite number, 1 is neither a prime number nor a composite number. Prime factors are divisors: factors of a composite number, and these factors are prime numbers.

Multiplication factor

In division, if the dividend is divided by the divisor, the quotient obtained is a natural number, and there is no remainder, it is said that the dividend is a multiple of the dividend, and the divisor is a factor of the dividend.

Composite number: The divisor of a number has other factors besides 1 and itself. This number is called composite number.

2 is the smallest prime number. .

1 is neither prime nor composite.

Prime number: A number with only 1 and its own two factors and no other factors is called a prime number. ..

Multiplication factor

In division, if the dividend is divided by the divisor, the quotient obtained is a natural number, and there is no remainder, it is said that the dividend is a multiple of the divisor, and negative integer: an integer less than 0. Such as:-1, -2

Multiplication, factor (divisor): An integer can be divisible by another integer, which is called a multiple of another number, and the other number is its factor or divisor. For example, 2 and 18, 6 is a factor (divisor) of 18, and 18 is a multiple of 6.

Prime number: an integer divisible only by 1 and itself. A prime number has only two divisors. For example: 2, 3, 5, 7

Complex number: An integer with other divisors besides 1 and itself. For example, 6, its divisor is 1, 2, 3, 6.

1 is neither prime nor composite. Dividend is the factor of dividend.

Negative Integer: Integer less than 0, there are countless. Such as:-1 (minimum negative integer), -2,-10.

(0 is neither positive nor negative. )

Prime number: also known as prime number, that is, a number has only two factors 1 and itself, but there are countless 1. Such as: 2 (the smallest prime number, the only even prime number), 3, 5, 7.

Composite number: There are other factors besides 1 and itself (as opposed to prime numbers). Such as: 4 (minimum composite number), 6, 8, 9 (minimum composite number is odd number).

(1 is neither a prime number nor a composite number. )

Multiplicity: A and B are multiples, A is a large number, and A is a multiple of B..

Factor: Also called divisor, A and B are multiples, B is a decimal, and B is a multiple of A. ..

(In division, a÷b=c, C and B are factors of A, and A is a common multiple of B and C ...)

The number of multiples of a number is infinite, and the number of factors of a number is limited. )

Distance on scale map: actual distance

We, の?ヽの Normal University Edition.