Menu

Interactive Bar

Google Services

Translate

Translate

Search

Search
  • Jarrow Cross C of E Primary School
‘Living and Learning’
Value in Everyone

Friday

Today we are going to continue finding fractions of amounts.  However, this time we are going to find the whole when we are given a fraction.

 

The example below might help you to understand.

1/5 of   ?   = 21     The example here asks you to find the missing number (the whole. We know that 1/5 is 21 and can use this to find the whole.

 

A bar diagram is a good way of illustrating this:

21

21

21

21

21

 

 

I know that 1/5 is 21 so if I do 21 x 5, I’ll find out what the whole is worth (105)

 

Let’s look at another example:

2/6 of     ?     = 32. I’m going to use a bar model again (you can draw your own if you need to for any questions today.

 

 

 

 

 

 

                    32

If 2/6 = 32, I know that 1/6 must be 16 (32÷2). When I add this information to the bar model you should be able to see that to find the value of the whole, I can do 16 x 6 = 96.

16

16

16

16

16

16

 

 

I hope this helps explain today's learning a little bit, now it's time to have a go!

Mrs Watson and Miss Pearce’s maths groups

Watch the video and complete the white rose video, pause and answer the questions when it asks you to.

Aut6.12.4 - Fractions of an amount - find the whole on Vimeo

 

Miss Wilcox and Miss Doran’s maths group 

Have a good at the attached sheet. (There is only one sheet to complete - I have added it as word document and a pdf, just use whichever format is best for you).

Top