Page 27 - Math Smart - 7

CHAPTER 1.4

In this chapter
Squares and Square Roots Pupils should be able to:

• recognise squares of
Squares and square roots are Important because they are needed when we
whole numbers to at
calculate areas. Suppose, one day, you have a square kitchen in your apartment
least 20 x 20
that needs tiling.
• recognise square roots
How many tiles do you need to tile the floor? of numbers up to the
square root of 400
• use square and square
root notation
Think and Share

Jackie is tiling her kitchen floor. The kitchen ^ RECALL
is square. The floor tiles are also square. Five
tiles fit along each side of the kitchen.
Q Fill in the boxes.
Help Jackie work out how many tiles she
a) 1 X 1 =
needs altogether by completing the diagram
on the right. b) 2 X 2 =
Jackie could also have calculated the number
c) 3 X 3 =
of tiles she needed like this:
• number of square tiles along one side x number of square tiles d) 5 X 5 =
along the other side

5 X 5 = 25 tiles OR 5^=25 tiles
□
We say five squared equals 25.
Q What are the square
What if Jackie used 16 square tiles to tile her
numbers from 6 to
square bathroom floor?
10?
Draw a diagram using the square here to
help Jackie work out how many tiles there
would be along each side of the bathroom.
Jackie could also have calculated the number
of tiles along each side of the bathroom
like this:
• number of square tiles along one side x number of square tiles
along the other side
50, 16 = 4x4 Vie = 4 tiles
We say the square root of 16 equals 4.