# Number Bonds: Adding up to 20 (3)

In this worksheet, students must simply know their addition number bonds up to 20. No explanations are given. Key stage:  KS 1

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Add and Subtract to 20

Difficulty level: ### QUESTION 1 of 10

In this worksheet, you must know your adding number bonds up to 20.

And that means knowing them off by heart.

Example

4 + 8

12

Remember

4 + 8 is the same as 8 + 4.

10 + 6 = 16 and 10 + 7 = 17 and so on.

0 + 5 = 5 and 0 + 19 = 19 and so on.

7 + 7 is twice 7 so 7 + 7 = 14.

6 + 5

5 + 9

0 + 20

2 + 6

1 + 15

13 + 2

9 + 9

9 + 4

3 + 12

12 + 3

• Question 1

6 + 5

11
• Question 2

5 + 9

14
• Question 3

0 + 20

20
• Question 4

2 + 6

8
• Question 5

1 + 15

16
• Question 6

13 + 2

15
• Question 7

9 + 9

18
• Question 8

9 + 4

13
• Question 9

3 + 12

15
• Question 10

12 + 3
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