# Find the Missing Numbers in the Equation

In this worksheet, students develop their algebra skills by finding the missing numbers in the given equations.

Key stage:  KS 2

Curriculum topic:   Algebra

Curriculum subtopic:   Express Problems Algebraically

Difficulty level:

### QUESTION 1 of 10

In this worksheet, find the missing numbers in the equation.

In algebra, we use a letter to represent the unknown number.

Examples:

1 + x = 4.   x =

To solve, use the inverse of addition, which is subtraction, to isolate the variable x.

x = 4 - 1

x = 3

4y = 24.   y =

To solve, use the inverse of multiplication, which is division, to isolate the variable y.

y = 24 ÷ 4

y = 6

Solve the following equation to find x:

x + 1 = 8

(Just write the final answer in the box below)

Solve the following equation to find y:

y + 4 = 24

(Just write the final answer in the box below)

Solve the following equation to find x:

x - 1 = 8

(Just write the final answer in the box below)

Solve the following equation to find y:

8y = 72

(Just write the final answer in the box below)

Solve the following equation to find a:

a ÷ 4 = 8

(Just write the final answer in the box below)

Solve the following equation to find x:

x - 7 = 80

(Just write the final answer in the box below)

Solve the following equation to find x:

15 + x = 18

(Just write the final answer in the box below)

Solve the following equation to find y:

15 - y = 8

(Just write the final answer in the box below)

Solve the following equation to find y:

15 ÷ y = 5

(Just write the final answer in the box below)

Solve the following equation to find y:

5y = 15

(Just write the final answer in the box below)

• Question 1

Solve the following equation to find x:

x + 1 = 8

(Just write the final answer in the box below)

7
EDDIE SAYS
x + 1 = 8 x = 8 - 1 x = 7
• Question 2

Solve the following equation to find y:

y + 4 = 24

(Just write the final answer in the box below)

20
EDDIE SAYS
y + 4 = 24 y = 24 - 4 y = 20
• Question 3

Solve the following equation to find x:

x - 1 = 8

(Just write the final answer in the box below)

9
EDDIE SAYS
x - 1 = 8 x = 8 + 1 x = 9
• Question 4

Solve the following equation to find y:

8y = 72

(Just write the final answer in the box below)

9
EDDIE SAYS
8y = 72 y = 72 divided by 8 y = 9
• Question 5

Solve the following equation to find a:

a ÷ 4 = 8

(Just write the final answer in the box below)

32
EDDIE SAYS
a ÷ 4 = 8 a = 8 x 4 a = 32
• Question 6

Solve the following equation to find x:

x - 7 = 80

(Just write the final answer in the box below)

87
EDDIE SAYS
x - 7 = 80 x = 80 + 7 x = 87
• Question 7

Solve the following equation to find x:

15 + x = 18

(Just write the final answer in the box below)

3
EDDIE SAYS
15 + x = 18 x = 18 - 15 x = 3
• Question 8

Solve the following equation to find y:

15 - y = 8

(Just write the final answer in the box below)

7
EDDIE SAYS
15 - y = 8 y = 15 - 8 y = 7
• Question 9

Solve the following equation to find y:

15 ÷ y = 5

(Just write the final answer in the box below)

3
EDDIE SAYS
15 ÷ y = 5 y = 15 ÷ 5 y = 3
• Question 10

Solve the following equation to find y:

5y = 15

(Just write the final answer in the box below)

3
EDDIE SAYS
5y = 15 y = 15 divided by 5 y = 3
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