Page 87 - New Medley 4 Semester 2 PDF (Merged)

8. A box has 20 balls in which some are red and remaining are blue. The
11
fraction for number of red balls is . How many balls are blue?
20

2 4
9. Find the sum of and .
7 7

5 8
10. Subtract from .
11 11

Equivalent Fractions

Draw four squares of the same size and divide them into 2, 4, 6 and 8
equal parts as shown below. Colour 1, 2, 3 and 4 parts respectively.

Square 1 Square 2 Square 3 Square 4

What parts of the squares are shaded?

1 2 3 4
Square 1: part Square 2: part Square 3: part Square 4: part
2 4 6 8

Each of them shows the same part of the whole square.
1 2 3 4
That means = = =
2 4 6 8

The above fractions are called equivalent fractions.

1 1×2 2 1 1× 3 3
Note that = = = =
2 2× 2 4 2 2×3 6

1 1× 4 4
= =
2 2× 4 8

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