Odd number: the part of speech is a noun. Odd numbers refer to numbers that are not even, that is, numbers that are not divisible by 2.
Even number: the part of speech is a noun, and even number refers to a number divisible by 2, that is, a number divisible by 2.
Through the table below, we know the meaning, pronunciation and usage of odd and even numbers.
Next, let's look at the difference between odd and even numbers:
1. Mathematical definition: odd numbers refer to numbers that are not divisible by 2, and even numbers refer to numbers that are divisible by 2.
Example:
-3 is an odd number.
3 is an odd number. )
-4 is an even number.
4 is an even number. )
2. Numeric features: odd-numbered units are 1, 3, 5, 7 and 9, and even-numbered units are 0, 2, 4, 6 and 8.
Example:
-13 is odd, because the unit number is 3.
13 is odd, because the number of units is 3. )
-20 is an even number because the unit number is 0.
(20 is an even number because the number of units is 0. )
3. Addition operation: the result of odd number and odd number addition is even number, and the result of even number and even number addition is even number.
Example:
-3+5 = 8, two odd numbers add up to an even number.
(3+5 = 8, all odd numbers add up to get even numbers. )
-2+4 = 6, two even numbers add up to an even number.
(2+4 = 6, two even numbers are added to get an even number. )
4. Multiplication operation: the result of odd number multiplied by odd number is odd number, and the result of even number multiplied by even number is even number.
Example:
-3 × 5 = 15, and the odd number multiplied by the odd number equals an odd number.
(3 × 5 = 15, multiply the odd number by the odd number to get the odd number. )
-2 × 4 = 8, even times even equals an even number.
(2 × 4 = 8, even number multiplied by even number gets even number. )
5. Graphic features: When representing the number of objects, odd numbers usually represent objects appearing in pairs, and even numbers usually represent objects appearing in pairs, such as odd numbers with only one eye and even numbers with two eyes.
Example:
-I drew three smiling faces and an odd number.
I drew three smiling faces, odd. )
-I drew four squares and an even number.
(Four squares are drawn, even. )