Fun with Fractions

Now that Múinteoir Clíona has shown you how to multiply fractions with whole numbers and multiply fractions by fractions using real-life examples, why not try our Fun with Fractions quizzes?

Have a look at our examples below and don't forget to simplify where possible! [Answers at the bottom of the sheet]

Example:  Multiplying a Fraction by a Whole Number

Ben is having a pizza party. Each person at the party will eat 3/8 of a pizza. If 6 people are coming to the party, how many pizzas does Ben need for them?

Solution:  6 × 3/8 = 18/8 =>[Turn this into a Mixed Number] => 2 2/8 => [Simplify the fraction] => 2 ¼.  Ben needs 2 ¼ pizzas. 

He should probably get 3 pizzas so he can have some to eat as well.  Otherwise, it won't be a fun party for the birthday boy, will it?

Now try these!   

1) Louise went to the Gaeltacht to study Irish for 5 days.  Each class lasted 4/5 of an hour each day.  How many hours did Louise spend learning Irish?

2) Mr. O’Connell baked 6 pies for his bakery. His recipe needed 4/9 of a bag of flour for each pie.  How much flour did he use?

3) Anne Marie swam 1 1/3 km on Wednesday, Thursday, Friday, Saturday and Sunday.  How many kilometres did she swim in total?

Send us pictures or videos of what you have done. Ask your parents to help you send them to rte.ie/learn

Example: Multiplying a Fraction by a Fraction

Joan is a painter. In March she used 4/5 of a litre of paint.  In April she used 2/3 of the amount of paint that she used in March.  How much paint did she use in April? 

Solution:  2/3 x 4/5 = 8/15 litre.

Now try these!   

1) Mark had a box of carrots, of which he gave 1/2 to his friend James.  James gave 3/4 of his share to his friend Emma. What fraction of the original box of carrots did Elena get?

2) There are 7/8 kilograms of salt in the kitchen. Michael used 2/15 of the salt when he was preparing dinner. How much salt did he use?

3) Lee spent ¾ of his pocket money on art materials. Of the money he spent on art materials, 5/6 was spent on coloured card.  What fraction of his pocket money did Lee spend on coloured card?

Send us pictures or videos of what you have done. Ask your parents to help you send them to rte.ie/learn

ANSWERS:  Multiplying a Fraction by a Whole Number

5 × 4/5 = 20/5 = 4 hours learning Irish.

6 x 4/9 = 24/9 = 2 6/9 = 2 2/3 bags of flour.

1 × 5 = 5km => 1/3 × 5 = 5/3 = 1 2/3km => 5km + 1 2/3km = 6 2/3

ANSWERS:  Multiplying a Fraction by a Fraction

½ x ¾ = 3/8 of the original box.

7/8 x 2/15 = 14/120 => 7/60 kg of salt.

¾ x 5/6 = [remember to cross divide –> 3 goes into 6 twice] = 5/8 of his pocket money.