Multiplication facts up to 10: find the missing factor
key notes :
๐ What is a Missing Factor?
A missing factor is the number you need to multiply with another number to get the product.
Example:
3 ร โฌ = 12 โ The missing factor is 4.
๐ฏ Use Division to Find the Missing Factor
If you donโt know the factor, divide the product by the known factor.
Example:
5 ร โฌ = 30 โ 30 รท 5 = 6 โ
๐ง Remember Multiplication & Division Are Related
They are inverse operations (opposites).
If a ร b = c, then c รท a = b and c รท b = a ๐
๐งฎ Know Your Multiplication Facts (1 to 10)
Memorizing multiplication tables helps you find missing factors quickly!
Example:
8 ร โฌ = 64 โ Think: 8 ร 8 = 64 โ Missing factor = 8
๐งฉ Use Skip Counting to Help
If you donโt remember the fact, skip count to reach the product.
Example:
6, 12, 18, 24 โ 6 ร 4 = 24
So 6 ร โฌ = 24 โ Missing factor = 4
๐ Look for Patterns
Patterns make it easier!
- Any number ร 1 = the number itself
- Any number ร 10 = add a 0
- Even number ร even number = even product
- Odd ร odd = odd product
๐ข Practice Makes You Faster
The more you practice, the quicker you find missing factors.
Try to solve mentally before writing!
๐ Example Problems
| Equation | Answer |
|---|---|
| 7 ร โฌ = 21 | 3 |
| โฌ ร 9 = 81 | 9 |
| 4 ร โฌ = 32 | 8 |
| โฌ ร 6 = 42 | 7 |
| 10 ร โฌ = 90 | 9 |
Learn with an example
Fill in the missing number.
5 ร ___ =15
You can find the missing number by using a multiplication fact you know. Or, you can list facts for multiplying by 5 until you reach 15.
5ร1=5
5ร2=10
5ร3=15
So, the missing number is 3.
Fill in the missing number.
____ร2=14
You can find the missing number by using a multiplication fact you know. Or, you can list facts for multiplying by 2 until you reach 14.
1ร2=2
2ร2=4
3ร2=6
4ร2=8
5ร2=10
6ร2=12
7ร2=14
So, the missing number is 7.
Fill in the missing number.
4 ร____=20
You can find the missing number by using a multiplication fact you know. Or, you can list facts for multiplying by 4 until you reach 20.
4ร1=4
4ร2=8
4ร3=12
4ร4=16
4ร5=20
So, the missing number is 5.
Let’s practice!๐๏ธ

