Times tables strategies - using what we know.

• Mathematics
• Lower Secondary (Key Stage 3)

Times tables strategies 

 Using what we know

What you need to know?

• Halving and doubling numbers up to 20.
  
• Number bonds to 10
  
• The 1s, 2s, 5s, and 10 times tables
  
• How to decompose a number e.g. How can we make 7 (using 1, 2, 5 or 10)?
  
• 5 + 2 makes 7
  
• How can we make 8 (using 1, 2, 5 or 10)?
  
• 10-2 makes 8?
  
• How can we make 6 (using 1, 2, 5 or 10)?
  
• 5+1 makes 6.
  

Make 3

3 x 8

• Let's make this easier ...
• 2 x 8 = 
• 16
• 1 x 8 = 8
• 8 +16 = 24

7 x 3

• 7 x 2 = 14
  
• 7 = 5 +2
  
• Double 5 is 10
  
• Double 2 is 4
  
• So 7 x 2 = 14
  
• 7 x 1 = 7
  
• 14 + 7 = 21
  

Make 4

6 x 4

• 6 x 2 = 12
  
• Double 12
  
• Double 10 is 20
  
• Double 2 is 4
  
• Double 12 is 24
  
• or 6 x 5 = 30
  
• 6 x 1 = 6
  
• 30-6 = 24
  

4 x 4

• 4 x 2 = 8
  
• Double 8 = 16
  
• Or
  
• 4 x 5 = 20
  
• 4 x 1 = 4
  
• 20 -4 = 16
  

4 x 3

Make 6

6 x 7

Make 7

6 x 7

• 6 x 5 = 30
  
• 6 x 2 = 12
  
• 6 x 7 = 42
  

7 x 8

• 7 x 8 is the same as 8 x 7 
• 8 x7 is the same as 8 x 5 + 8 x 2
• 8 x 5 = 40 
• 8 x 2 = 16
• 40 + 16 is 56

7 x 8

Make 8

6 x 8

• 6 x 10 = 60
  
• 6 x 2 = 12
  
• 60-12 = 48
  

8 x 9

Make 9

9 x 9

6 x 4

1. 30
2. 24

7 x 3

1. 21
2. 14

4 x 4

1. 20
2. 16

6 x 8

1. 60
2. 48

6 x 7

1. 42
2. 30

7 x 8

1. 56
2. 40

6 x 9

• 6 x 10 = 60
  
• 6 x 1 = 6
  
• 60 – 6 = 54
  
• Use hands for 9 x tables

9 x 2

1. 9
2. 18

9 x 10

1. 81
2. 90

9 x 5

1. 36
2. 45

9 x 4

1. 36
2. 45