MALT©2006 Maths/Fractions Slide Show : Lesson 3 Fractions Lesson 3 Understanding equivalent fractions MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 These numbers are called fractions 1 2 3 15 12 22 2 3 5 6 4 7 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Here are some mixed numbers 5 4 9 2 1 3 3 2 5 2 1 4 1 6 8 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Today’s lesson looks at Equivalent fractions 6 8 3 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 WALT : to understand equivalent fractions and decide if fractions are equal 6 8 3 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 In the word equivalent there is the root word equal 6 8 3 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Fractions which are said to be equivalent are equal to each other. 6 8 3 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 For example 2 4 1 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 So if you were given 2 quarters of a cake and your friend was given half a cake would you both have the same amount? 2 4 1 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Yes! These fractions are equal. These are equivalent fractions. 2 4 1 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Can you tell if the following fractions are equal? Are they equivalent fractions? 1 2 3 6 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Yes these fractions are equal. They are equivalent fractions. 1 2 3 6 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Are they equivalent fractions? 2 3 4 6 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Yes they are equivalent fractions. 2 3 4 6 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Are they equivalent fractions? 1 4 3 12 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Yes they are equivalent fractions. 1 4 3 12 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Are they equivalent fractions? 1 3 2 5 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 No, they are not equal. They are not equivalent fractions. 1 3 2 5 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Here are some equivalent fractions. Can you work out a strategy for deciding whether they are equal? 2 8 1 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Here are some equivalent fractions. Can you work out a strategy for deciding whether they are equal? 4 10 2 5 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Here are some equivalent fractions. Can you work out a strategy for deciding whether they are equal? 3 9 1 3 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Use thinking time to discuss. 1 4 3 12 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Use thinking time to discuss. 5 10 1 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ideas have you come up with? 5 10 1 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Explain your strategy to the class. 5 10 1 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 There is a relationship between the fractions using dividing and multiplying. 5 20 1 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. 5 20 1 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. divide by 5 1 4 5 20 divide by 5 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. divide by 2 1 2 2 4 divide by 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. divide by 3 1 4 3 12 divide by 3 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. divide by 4 1 5 4 20 divide by 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. divide by 2 1 4 2 8 divide by 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. multiply by 3 9 15 3 5 multiply by 3 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What ever you do to the top number . . You must do to the bottom number. multiply by 2 4 18 2 9 multiply by 2 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What is the missing number? 10 1 5 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What is the missing number? 4 4 8 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 What is the missing number? 4 32 40 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Well done 4 32 40 5 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Sometimes you might need to work out equivalent fractions in three steps. 48 64 6 8 3 4 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Follow up task H7 Textbook Page 38 Questions 1,2,3 MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 Answers MALT©2006 Maths/Fractions Slide Show : Lesson 3

MALT©2006 Maths/Fractions Slide Show : Lesson 3 End of this lesson, any questions or comments? MALT©2006 Maths/Fractions Slide Show : Lesson 3