Page 29 - Math Smart - 7

The numbers: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100 and 400 that you have listed in the
second column are called square numbers.

A square number is the product obtained when a whole number is multiplied
by itself.
O Spotlight

1 X 1 can be written as 1^
in each case, the number
2x2 can be written as 2^ Most calculators have
is multiplied by Itself.
for
a key like this Q
3x3 can be written as 3^ finding the square of a
number.
Example 7

• ••••
• ••• • ••••
••
• • ••••
••
•• • • ••• • ••••
••
• •• • • ••• • ••••
1 X 1 2x2 3X3 4X4 5X5

1 4 9 16 25

Check My
Understanding

O Complete the table. 3^ has been done as an example for you. Spotlight

Square numbers Square numbers
Did you
I Did vou know that when
32 9 122
you add odd numbers in
42 132 sequence, you get square
numbers?
5^ 142
6^ 152
72 162
8^ 172

92 182 1 +3 + 5 + 7 = 16
10^ 192
112 202
The numbers 4, 9, 16
and 25 are ail square
@ On a hundred grid, shade all the square numbers. numbers.

Q Draw a dot pattern to represent each square number,

a) 72 b) 9'

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