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Mental Calculations with Square Numbers

In this worksheet, students add together square numbers in their heads.

'Mental Calculations with Square Numbers' worksheet

Key stage:  KS 3

Curriculum topic:  Number

Curriculum subtopic:  Understand Integer Powers/Real Roots

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

This worksheet is about square numbers.

 

Remember that to square a number, you simply multiply it by itself.

So 52 = 5 x 5 =25

 

You should know the first few square numbers off by heart.

1, 4, 9, 16, 25, 36, 49,, 64, 81, 100, 121, 144

 

Example

Work the following out in your head.

42 + 32  = 
 

 

Answer

16 + 9 = 25

42 + 32  = 
 25

 

 

Work the following out in your head:

 

52 + 22  = 
 

Work the following out in your head:

 

42 + 122  = 
 

Work the following out in your head:

 

12 + 112  = 
 

Work the following out in your head:

 

52 + 102  = 
 

Work the following out in your head:

 

52 + 52  = 
 

 

Work the following out in your head:

 

42 + 102  = 
 

Work the following out in your head:

 

122 + 102  = 
 

Work the following out in your head:

 

22 + 112  = 
 

Work the following out in your head:

 

52 + 62  = 
 

Work the following out in your head:

 

52 + 62 + 52 + 62

 

 

  • Question 1

Work the following out in your head:

 

52 + 22  = 
 

CORRECT ANSWER
29
  • Question 2

Work the following out in your head:

 

42 + 122  = 
 

CORRECT ANSWER
160
EDDIE SAYS
16 + 144
  • Question 3

Work the following out in your head:

 

12 + 112  = 
 

CORRECT ANSWER
122
  • Question 4

Work the following out in your head:

 

52 + 102  = 
 

CORRECT ANSWER
125
  • Question 5

Work the following out in your head:

 

52 + 52  = 
 

 

CORRECT ANSWER
50
  • Question 6

Work the following out in your head:

 

42 + 102  = 
 

CORRECT ANSWER
116
  • Question 7

Work the following out in your head:

 

122 + 102  = 
 

CORRECT ANSWER
244
  • Question 8

Work the following out in your head:

 

22 + 112  = 
 

CORRECT ANSWER
125
  • Question 9

Work the following out in your head:

 

52 + 62  = 
 

CORRECT ANSWER
61
  • Question 10

Work the following out in your head:

 

52 + 62 + 52 + 62

 

 

CORRECT ANSWER
122
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