Menu
Home Page

Maths

19.11.20

LC: To compare and order fractions

 

Yesterday, we began to order fractions by comparing them. It is sometimes difficult to compare fractions when they have different denominators - so let's see how to make the denominators the same. This will make it much easier!

 

We call this FINDING COMMON DENOMINATORS.

These denominators are all different so let's make them the same (common denominators). 

Recap

 

2/3        3/4       5/6

 

If we can find the lowest common multiple (LCM) for the denominators then we can find the lowest common denominator.

 

What is the lowest common multiple for 3, 4 and 6 (The lowest number that is in the 3, 4 and 6 times tables) - it's 12!

 

Remember the important rule to keep them equivalent - Whatever we do to the top, we do to the bottom or Whatever we do to the bottom, we do to the top. 

 

So

 

2/3 becomes 8/12

 

3/4 becomes 9/12

 

5/6 becomes 10/12

 

So the order from smallest to largest is: 2/3 (because it's the same as 8/12) 3/4 (because it's the same as 9/12) and 5/6 (because it's the same as 10/12).

 

Let's have a go at the Guided Practice! 

 

 

When you are feeling confident, move on to the independent task. Please set these out in your book neatly whether you are at home or in school.
Top