Addition and subtraction – ways to make a number
key notes
🌟 What Does “Ways to Make a Number” Mean?
- A number can be made using different combinations of smaller numbers.
- We use addition (+) and subtraction (−) to make numbers.
➕ Addition – Making Numbers
- Addition means putting things together.
- We use the + sign.
Examples:
- 2 + 3 = 5
- 1 + 4 = 5
👉 So, 5 can be made in many ways.
➖ Subtraction – Breaking Numbers
- Subtraction means taking away.
- We use the − sign.
Examples:
- 5 − 2 = 3
- 5 − 1 = 4
👉 Subtraction helps us find missing parts.
🔢 Number Bonds (Parts of a Number)
- A number can be split into two parts.
- These are called number bonds.
Example (5):
- 5 = 2 + 3
- 5 = 1 + 4
- 5 = 0 + 5
✋ Using Fingers and Objects
- Use fingers, toys, or blocks to count.
- Helps children see and understand numbers easily.
🔁 Turnaround Facts (Commutative Property)
- Numbers can be added in any order.
Example:
- 2 + 3 = 5
- 3 + 2 = 5
🎯 Making 10 (Important Skill)
- Learning ways to make 10 is very useful.
Examples:
- 6 + 4 = 10
- 7 + 3 = 10
- 5 + 5 = 10
🧠 Key Skills to Learn
- Counting correctly
- Understanding part–part–whole
- Using addition and subtraction together
- Recognizing different ways to make the same number
Learn with an example
🔎How do you make 2?
- 8 − 5
- 1 + 0
- 0 + 1
- 1 + 1
This is a way to make 2:
- 1 + 1 = 2
These are not ways to make 2:
- 8 − 5 = 3
- 1 + 0 = 1
- 0 + 1 = 1
🔎How do you make 7?
- 3 + 4
- 8 − 0
- 6 + 2
- 5 + 3
This is a way to make 7:
- 3 + 4 = 7
These are not ways to make 7:
- 8 − 0 = 8
- 6 + 2 = 8
- 5 + 3 = 8
🔎How do you make 4?
- 1 + 3
- 0 + 2
- 10 − 7
- 6 − 0
This is a way to make 4:
- 1 + 3 = 4
These are not ways to make 4:
- 0 + 2 = 2
- 10 − 7 = 3
- 6 − 0 = 6
Let’s practice!
