Even and Odd numbers
What is a Pair?
– A pair means two things that go together.
– When we talk about pairs in math, we’re talking about grouping things in twos.
Examples of Pairs:
– Shoes: When you have a pair of shoes, you have 2 shoes, one for each foot.
– Socks: A pair of socks means you have 2 socks, one for each foot.
– Gloves: A pair of gloves means you have 2 gloves, one for each hand.
Counting in Pairs
When we count in pairs, we group things into twos. For example:
– If you have 4 socks, you can make 2 pairs.
– If you have 6 apples, you can make 3 pairs.
How to Make Pairs:
1. Start with a group of objects: Let’s say you have 8 pencils.
2. Group them into twos: Put 2 pencils together at a time.
3. Count the number of groups: You’ll have 4 pairs of pencils.
Why Are Pairs Important?
Understanding pairs helps in learning about even numbers, addition, and multiplication. It also helps us organize things in an easier way.
For example, when you put things in pairs, you can quickly see if you have an even number of items (like 4, 6, 8) or if one is left out, making it an odd number (like 5, 7, 9).
Even Numbers:
– Even numbers are numbers that can be divided by 2 without leaving any remainder.
– They always end with 0, 2, 4, 6, or 8.
Examples of Even Numbers:
– 2: If you divide 2 by 2, you get 1 with no remainder.
– 4: If you divide 4 by 2, you get 2 with no remainder.
– 10: If you divide 10 by 2, you get 5 with no remainder.
So, 2, 4, and 10 are all even numbers.
Odd Numbers:
– Odd numbers are numbers that cannot be divided by 2 evenly. They leave a remainder of 1.
– They always end with 1, 3, 5, 7, or 9.
Examples of Odd Numbers:
– 1: If you divide 1 by 2, you get 0 with a remainder of 1.
– 3: If you divide 3 by 2, you get 1 with a remainder of 1.
-7: If you divide 7 by 2, you get 3 with a remainder of 1.
So, 1, 3, and 7 are all odd numbers.