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Square numbers

A

square

A square

A square is a shape which has 4 equal sides.

Square

unit

A square unit

1

1 x 1 = 1

Consider a square of sides 1 unit.

A unit square/square unit

Let us use square units to build squares of different sizes.

A

B

D

C

16

9

1

4

Using square

units

E

E?

25

The square number is obtained when a whole number is multiplied by itself.

Examples

The square number is obtained when a whole number is multiplied by itself.

5

4

3

2

5

4

1

3

2

1

E

5 rows,

5 columns

4 rows,

4 columns

1 row,

1 column

2 rows,

2 columns

3 rows,

3 columns

5 x 5 = 25

4 x 4 = 16

1 x 1 = 1

2 x 2 = 4

3 x 3 = 9

5

3

4

2

1

Other arrangements

1

1 + 3 + 5 + 7

1 + 3

1 + 3 + 5

1

4

9

16

Other

arrangements

Square Numbers

2

1

1 x 1 = 1

2 x 2 = 4

3 x 3 = 9

4 x 4 = 16...

1

1 + 3 = 4

1 + 3 + 5 = 9

1 + 3 + 5 + 7 = 16...

Summary

ASSESSMENT

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