Reevy Hill Primary School

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Maths

This week we are learning about Fractions.

 

Lesson 1

LO: 

To compare and order fractions whose denominators are all multiples of the same number.

Starter:

Put these fractions in order from the smallest to the largest:

 5/9,  1/9,  7/9,  4/9, 8/9

How do you think that we can order the fractions: 5/8 and 3/4? 

 

Use bar models

Use common numerators

We can also order fractions without diagrams.  

When  the denominators are different we need to make sure that we do two things:
1. Change each fraction to a fraction that is equivalent to it
2. Change each of them to a fraction with the same denominator

 

Look at the following fractions  - ¾, 1/3, 4/6
Write all the multiples of the denominator 4 (3/4) -  4, 8, 12, 16, 20, 24 
Write all the multiples of the denominator 3 (1/3) -  3, 6,  9, 12, 15, etc
Write all the multiples of the denominator 6 (4/6) -  6, 12, 18  etc
Find the multiple that all the denominators have in common – The lowest common multiple  which is 12.

We now need to change all the fractions to the equivalent 12 e.g
¾ - What is 4 multiply by to get 12 ?    3
So as we multiply the denominator to get 12  (4x3= 12)
We do the same with the numerator 3 x 3 = 9
¾ = 9/12

 

Find the equivalent 12 of 1/3  
1/3 – What is 3 multiply by to get 12?   4
Do the same for the numerator  1x4 = 4
1/3 = 4/12

 

Repeat with 4/6 = 8/12
We now order the fractions from lowest to highest- 
1/3, 4/6, 3/4

 Complete the worksheet below then use the answer sheet to check your answers.

Lesson 2

LO: To recognise mixed numbers and improper fractions and convert from one form to the other.

 

Starter:

Find the equivalent fractions of:

1/2,  1/4, 3/4

 

Go through the powerpoint presentation below then answer the follow questions.

Lesson 3

LO: To add and subtract fractions

Go through the power point presentation below then answer the questions.

Lesson 4

LO:  To subtract fractions

Go through the powerpoint presentation then answer the questions.

Subtracting Fractions

Remember to log on to TTRockstars to practise your time tables.

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