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Addition and Subtraction Facts to 20 (2)

In this worksheet, students must know by heart their addition and subtraction number bonds to 20. No explanations are given.

'Addition and Subtraction Facts to 20 (2)' worksheet

Key stage:  KS 1

Curriculum topic:  Number: Addition and Subtraction

Curriculum subtopic:  Use Addition/Subtraction Facts to 100

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Look at this number square, which shows all the bonds you should know by heart up to 20.

 

 

Example 1

Add  6 + 9 

 

Answer

You should know this by heart, but the number square shows that it is 15.

 

 

Example 2

Subtract  15 - 9 

 

Answer

You should know this by heart, but the number square shows that it is 6.

When you subtract, the starting number is inside the square.

 

 

Example 3

Add  12 + 5

 

Answer

You should know that   2 + 5 = 7,

so 12 + 5 = 17

 

Example 4

Subtract 16 - 12

 

Answer

You should know that   6 - 2 = 4,

so 16 - 12 = 4 as well. 

Add 

7 + 8

Subtract 

15 - 8

Add 

9 + 10

Subtract 

20 - 6

Add 

4 + 8

Subtract 

15 - 5

Add 

8 + 8

Subtract 

15 - 3

Add 

17 + 2

Subtract 

13 - 8

Add 

3 + 8

Subtract 

12 - 8

Add 

9 + 5

Subtract 

18 - 9

Add 

6 + 7

Subtract 

12 - 5

Add 

5 + 6

Subtract 

14 - 7

Add 

14 + 6

Subtract 

17 - 12

  • Question 1

Add 

7 + 8

CORRECT ANSWER
15
  • Question 2

Subtract 

15 - 8

CORRECT ANSWER
7
  • Question 3

Add 

9 + 10

CORRECT ANSWER
19
  • Question 4

Subtract 

20 - 6

CORRECT ANSWER
14
  • Question 5

Add 

4 + 8

CORRECT ANSWER
12
  • Question 6

Subtract 

15 - 5

CORRECT ANSWER
10
  • Question 7

Add 

8 + 8

CORRECT ANSWER
16
  • Question 8

Subtract 

15 - 3

CORRECT ANSWER
12
  • Question 9

Add 

17 + 2

CORRECT ANSWER
19
  • Question 10

Subtract 

13 - 8

CORRECT ANSWER
5
  • Question 11

Add 

3 + 8

CORRECT ANSWER
11
  • Question 12

Subtract 

12 - 8

CORRECT ANSWER
4
  • Question 13

Add 

9 + 5

CORRECT ANSWER
14
  • Question 14

Subtract 

18 - 9

CORRECT ANSWER
9
  • Question 15

Add 

6 + 7

CORRECT ANSWER
13
  • Question 16

Subtract 

12 - 5

CORRECT ANSWER
7
  • Question 17

Add 

5 + 6

CORRECT ANSWER
11
  • Question 18

Subtract 

14 - 7

CORRECT ANSWER
7
  • Question 19

Add 

14 + 6

CORRECT ANSWER
20
  • Question 20

Subtract 

17 - 12

CORRECT ANSWER
5
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