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Find the Missing Numbers in the Equation

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

'Find the Missing Numbers in the Equation' worksheet

Key stage:  KS 2

Curriculum topic:   Algebra

Curriculum subtopic:   Express Problems Algebraically

Difficulty level:  

Worksheet Overview

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)

CORRECT ANSWER
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)

CORRECT ANSWER
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)

CORRECT ANSWER
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)

 

CORRECT ANSWER
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)

 

CORRECT ANSWER
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)

 

CORRECT ANSWER
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)

 

CORRECT ANSWER
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)

 

CORRECT ANSWER
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)

CORRECT ANSWER
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)

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