Page 73 - SK Year 5 Mathematics DLP

FRACTIONS, DECIMALS,
22 FRACTIONS, DECIM ALS,

T
AND PERCEN
AND PERCENTAGES
AGES

MULTIPLICATION OF FRACTIONS
MARBLE CAKE RECIPE
3
1 I measure 2 times of cups of castor 1 tablespoon of
4
sugar to make 2 batches of cake batter. 1 cup of baking powder
butter
1 teaspoon of
3 eggs vanilla essence
3
4 cup of 2 tablespoons of
castor sugar cocoa powder
1 3 tablespoons
1 cups of of sweetened
2
wheat flour condensed milk

How many cups of castor sugar are needed to make 2 batches of cake batter?
3
2 × cup = cups
4
3
2
3
Method 1 2 × = × Convert whole number to
3 4 1 4 improper fraction.
2 ×
4 6 ÷ 2 Multiply numerator with
= numerator. Multiply
4 ÷ 2
3 denominator with denominator.
= Simplify fraction.
1 2
1 1 Convert improper fraction to
2 = 1 mixed numbers.
2
1
Method 2 3 2 3
2 × = × do
4 1 4 cancellation
2
3
=
2
1
= 1
2
3 1
2 × cup = 1 cups
4 2
1
1 cups of castor sugar are needed to make 2 batches of cake batter.
2

• Show the steps on how to multiply whole numbers with fractions. 65
2.1.1 • Use shaded diagram to reinforce the multiplication concept.
Recall the conversion of improper fractions to mixed numbers.