# Addition and Subtraction: Find the Missing Number (1)

In this worksheet, students solve missing number problems using subtraction (0-20).

Key stage:  KS 1

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Solve Add/Subtract Problems to 20

Difficulty level:

### QUESTION 1 of 10

In subtraction, you take something away. (It is opposite of addition. In addition, you add something on.)

Example

Look at this problem. A number is missing.

You need to find its value.

 6 - = 1

You can use subtraction. Here's how.

6 - 1 = 5

So the missing value = 5

6 - 5 = 1

Find the missing number. Use subtraction.

Type the value.

 ? - 1 = 2

Find the missing number. Use subtraction.

Type the value.

 ? - 4 = 3

Find the missing number. Use subtraction.

Type the value.

 7 - 3 = ?

Find the missing number. Use subtraction.

Type the value.

 15 - ? = 11

Find the missing number. Use subtraction.

Type the value.

 18 - 3 = ?

Find the missing number. Use subtraction.

Type the value.

 ? - 4 = 16

Find the missing number. Use subtraction.

Type the value.

 9 - ? = 2

Find the missing number. Use subtraction.

Type the value.

 ? - 6 = 5

Find the missing number. Use subtraction.

Type the value.

 ? - 1 = 10

Find the missing number. Use subtraction.

Type the value.

 ? - 1 = 18
• Question 1

Find the missing number. Use subtraction.

Type the value.

 ? - 1 = 2
3
EDDIE SAYS

1 + 2 = 3

Missing number = 3

Check:

3 − 1 = 2

• Question 2

Find the missing number. Use subtraction.

Type the value.

 ? - 4 = 3
7
EDDIE SAYS

4 + 3 = 7

Missing number = 7

Check:

7 − 4 = 3

• Question 3

Find the missing number. Use subtraction.

Type the value.

 7 - 3 = ?
4
EDDIE SAYS

7 − 3 = 4

Missing number = 4

Check:

3 + 4 = 7

• Question 4

Find the missing number. Use subtraction.

Type the value.

 15 - ? = 11
4
EDDIE SAYS

15 − 11 = 4

Missing number = 4

Check:

15 − 4 = 11

• Question 5

Find the missing number. Use subtraction.

Type the value.

 18 - 3 = ?
15
EDDIE SAYS

18 − 3 = 15

Missing number = 15

Check:

15 + 3 = 18

• Question 6

Find the missing number. Use subtraction.

Type the value.

 ? - 4 = 16
20
EDDIE SAYS

4 + 16 = 20

Missing number = 20

Check:

20 − 4 = 16

• Question 7

Find the missing number. Use subtraction.

Type the value.

 9 - ? = 2
7
EDDIE SAYS

9 − 2 = 7

Missing number = 7

Check:

9 - 7 = 2

• Question 8

Find the missing number. Use subtraction.

Type the value.

 ? - 6 = 5
11
EDDIE SAYS

6 + 5 = 11

Missing number = 11

Check:

11 − 6 = 5

• Question 9

Find the missing number. Use subtraction.

Type the value.

 ? - 1 = 10
11
EDDIE SAYS

10 + 1 = 11

Missing number = 11

Check:

11 − 1 = 10

• Question 10

Find the missing number. Use subtraction.

Type the value.

 ? - 1 = 18
19
EDDIE SAYS

1 + 18 = 19

Missing number = 19

Check:

19 − 1 = 18

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