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In this worksheet, students identify, from a range of 0 to 10, what number they should add to complete a sum. Key stage:  KS 1

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Solve Add/Subtract Problems to 20

Difficulty level:   ### QUESTION 1 of 10

Adding whole numbers means that we are combining numbers to form a total.

To identify the missing number, the given number is subtracted from the total number.

Example

What must I add to 6 to make 7?

 6 + ? = 7

7 - 6 = 1

The missing number is 1

What must I add to 7 to make 9? Write the missing word in the box below.

 7 + ? = 9

What must I add to 7 to make 10? Write the missing word in the box below.

 ? + 7 = 10

What must I add to 8 to make 10? Write the missing word in the box below.

 8 + ? = 10

What must I add to 3 to make 7? Write the missing word in the box below.

 3 + ? = 7

What must I add to 1 to make 6? Write the missing word in the box below.

 1 + ? = 6

What must I add to 4 to make 10? Write the missing word in the box below.

 ? + 4 = 10

What must I add to 2 to make 9? Write the missing word in the box below.

 2 + ? = 9

What must I add to 1 to make 9? Write the missing word in the box below.

 ? + 1 = 9

What must I add to 1 to make 10? Write the missing word in the box below.

 ? + 1 = 10

What must I add to 5 to make 10? Write the missing word in the box below.

 ? + 5 = 10
• Question 1

What must I add to 7 to make 9? Write the missing word in the box below.

 7 + ? = 9
2
EDDIE SAYS

Method

9 - 7 = 2

Missing Number = 2

• Question 2

What must I add to 7 to make 10? Write the missing word in the box below.

 ? + 7 = 10
3
EDDIE SAYS

Method

10 - 7 = 3

Missing Number = 3

• Question 3

What must I add to 8 to make 10? Write the missing word in the box below.

 8 + ? = 10
2
EDDIE SAYS

Method

10 - 8 = 2

Missing Number = 2

• Question 4

What must I add to 3 to make 7? Write the missing word in the box below.

 3 + ? = 7
4
EDDIE SAYS

Method

7 - 3 = 4

Missing Number = 4

• Question 5

What must I add to 1 to make 6? Write the missing word in the box below.

 1 + ? = 6
5
EDDIE SAYS

Method

6 - 1 = 5

Missing Number = 5

• Question 6

What must I add to 4 to make 10? Write the missing word in the box below.

 ? + 4 = 10
6
EDDIE SAYS

Method

10 - 4 = 6

Missing Number = 6

• Question 7

What must I add to 2 to make 9? Write the missing word in the box below.

 2 + ? = 9
7
EDDIE SAYS

Method

9 - 2 = 7

Missing Number = 7

• Question 8

What must I add to 1 to make 9? Write the missing word in the box below.

 ? + 1 = 9
8
EDDIE SAYS

Method

9 - 1 = 8

Missing Number = 8

• Question 9

What must I add to 1 to make 10? Write the missing word in the box below.

 ? + 1 = 10
9
EDDIE SAYS

Method

10 - 1 = 9

Missing Number = 9

• Question 10

What must I add to 5 to make 10? Write the missing word in the box below.

 ? + 5 = 10
5
EDDIE SAYS

Method

10 - 5 = 5

Missing Number = 5

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