 # Mental Calculations with Square Numbers Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Understand Integer Powers/Real Roots

Difficulty level:   ### 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

42 + 32  =

16 + 9 = 25

42 + 32  =
 25

52 + 22  =

42 + 122  =

12 + 112  =

52 + 102  =

52 + 52  =

42 + 102  =

122 + 102  =

22 + 112  =

52 + 62  =

52 + 62 + 52 + 62

• Question 1

52 + 22  =

29
• Question 2

42 + 122  =

160
EDDIE SAYS
16 + 144
• Question 3

12 + 112  =

122
• Question 4

52 + 102  =

125
• Question 5

52 + 52  =

50
• Question 6

42 + 102  =

116
• Question 7

122 + 102  =

244
• Question 8

22 + 112  =

125
• Question 9

52 + 62  =

61
• Question 10

52 + 62 + 52 + 62

122
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