Review – subtract one-digit numbers – up to 10
Key notes :
What is Subtraction?
- Subtraction means taking away some objects from a group.
- Example: 🍎🍎🍎🍎 – 2 🍎 = 🍎🍎
Subtraction Symbol
- The symbol for subtraction is “−”.
- Example: 5 − 3 = 2
Subtraction Terms
Minuend: The number you start with.
Subtrahend: The number you take away.
Difference: The answer you get after subtracting.
Example: 7 − 4 = 3
- Minuend = 7
- Subtrahend = 4
- Difference = 3
Subtraction Facts (up to 10)
Know your number pairs that make 10:
- 10 − 1 = 9
- 10 − 2 = 8
- 10 − 3 = 7
- …
- 10 − 9 = 1
Counting Back Method
- Start from the minuend and count back the subtrahend.
- Example: 6 − 2 → start at 6, count back 2 → 5, 4 → answer = 4
Using Objects
- Use fingers, beads, or toys to help subtract.
- Example: You have 5 candies 🍬🍬🍬🍬🍬 and eat 2 🍬🍬 → left = 3 🍬
Zero in Subtraction
- Any number minus 0 is the number itself.
- Example: 7 − 0 = 7
Practice Tip
- Start with small numbers and gradually practice all numbers up to 10.
- Use colorful charts and drawings to make subtraction fun!
Learn with an example
Subtract:
2 – 1 = _____
There are 2 tractors in total. 1 of them is crossed out. What number do you get when you start with 2 and take away 1?
To find 2 minus 1, count the tractors that are not crossed out.
There is 1 tractor left. When you start with 2 and take away 1, you are left with 1.
So, 2 − 1 = 1.
Subtract:
8 – 4 = _____
There are 8 cars in total. 4 of them are crossed out. What number do you get when you start with 8 and take away 4?
To find 8 minus 4, count the cars that are not crossed out.
There are 4 cars left. When you start with 8 and take away 4, you are left with 4.
So, 8 − 4 = 4.
Subtract:
10 – 4 = _____
There are 10 cars in total. 4 of them are crossed out. What number do you get when you start with 10 and take away 4?
To find 10 minus 4, count the cars that are not crossed out.
There are 6 cars left. When you start with 10 and take away 4, you are left with 6.
So, 10 − 4 = 6.
Let’s practice!🖊️
