Even or odd
key notes :
| What are Even Numbers? |
Even numbers are numbers that can be divided into two equal groups. Imagine you have some cookies. If you can share them perfectly with your friend so you both have the same amount, then it’s an even number!
Even numbers always end in 0, 2, 4, 6, or 8.
| Examples of Even Numbers: |
- 2 (1 + 1)
- 4 (2 + 2)
- 6 (3 + 3)
- 8 (4 + 4)
- 10 (5 + 5)
They can all be split in half!
Let’s try with 4 apples 🍎🍎🍎🍎
Can we share them equally?
🍎🍎
🍎🍎
Yes! 4 is an even number!
| What are Odd Numbers? |
Odd numbers are numbers that cannot be divided into two equal groups. If you try to share them, one person will have one more! There will always be someone left out!
Odd numbers always end in 1, 3, 5, 7, or 9.
| Examples of Odd Numbers: |
- 1
- 3 (1 + 1 + 1)
- 5 (2 + 2 + 1)
- 7 (3 + 3 + 1)
- 9 (4 + 4 + 1)
There’s always one left over!
Let’s try with 5 cookies 🍪🍪🍪🍪🍪
Can we share them equally?
🍪🍪
🍪🍪
🍪
Nope! 5 is an odd number!
| Let’s Practice! |
Are these numbers even or odd?
- 12
- 15
- 20
- 23
- 31
- 36
Think: Look at the last number. Does it end in 0, 2, 4, 6, 8 (even) or 1, 3, 5, 7, 9 (odd)?
Great job today! You are now Even and Odd Number Experts!
Learn with an example
🔴 Is the number of rectangles even or odd?
The rectangles can not be matched in pairs. The number of rectangles is odd.
You can check your answer by counting the rectangles. There are 9 rectangles. 9 is a odd number.
🔴 Is the number of diamonds even or odd?
The diamonds can be matched in pairs. The number of diamonds is even.
You can check your answer by counting the diamonds. There are 10 diamonds. 10 is an even number.
Is the number of squares even or odd?
- even
- odd
The squares can be matched in pairs. The number of squares is even.
You can check your answer by counting the squares. There are 8 squares. 8 is an even number.
Let’s practice!
