Page 135 - Math Genius C2

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one-third

When we divide a whole thing into three equal 1 (one-third) 1

parts, each part is called one-third. We write 3 3 (one-third)
1
one-third as .
3 1
Here, a pizza is cut into three equal parts. Each 3 (one-third)
1 1
part of the pizza is one-third of the whole. We read as 1 upon 3 or 1 by 3.
3 3
Note that three one-thirds make a whole.

Practice time 7A

1. Tick () the shapes that are divided into equal parts.

(a) (b) (c) (d) (e)

2. Colour one-half of each figure.

(a) (b) (c) (d) (e)

3. Colour one-third of each figure.

(a) (b) (c) (d) (e)

4. Draw a square and divide it into three equal parts.

Shade the part that represents one-third.

one-fourth or quArter

When we divide a whole thing into four equal parts,
then each part is called one-fourth or a quarter. 1 (one-fourth) 1 (one-fourth)
1 4 4
We write one-fourth as .
4
Here, an apple is cut into four equal
1
parts. Each part is one-fourth of
1 4
the whole. We read as 1 upon 4

or 1 by 4. 4

Note that four one-fourths make a whole. 1 (one-fourth) 1 (one-fourth)
4 4

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