1. THURSDAY 4TH OF OCTOBER
YEAR 6 SET 1 MATHS

2. L.O: ORDERING FRACTIONS

3. Ordering fractions which have different denominators can be difficult……
Would you rather have…..
of a pizza?

4. Its hard to decide which is the biggest, so this is what we do to make it easier….
Each of these fractions has a different denominator. We need to change the denominator so that they all have the
Same one.

5. This is how we change the denominator…….
We find a larger number that all three
denominators with multiply into. For
example, the numbers 5, 4 and 10 all can
multiply to make 20- so we make the common
denominator 20.

6. This is how we change the denominator…….
X 5
X 2
X 4
We multiply 10 by
2 to get a denominator
of 20
We multiply 4
by 5 to get a
denominator
Of 20
We multiply 5 by
4 to get a
denominator
of 20

7. What ever we multiply the denominator by, we must do the same with the numerator
X 5
X 2
X 4
Now its easy to place these in order!

8. What ever we multiply the denominator by, we must do the same with the numerator
So this one is the biggest
X 5
X 2
X 4
Now its easy to place these in order!

9. RECAP….. To order fractions we first must change the denominator
Find a larger number that all the denominators will multiply into (e.g. 18)
Decide what you need to multiply each fraction into to get the same denominator (e.g. by 4 or 5)
Make sure you multiply the numerator by the same amount
Now its easy to order the fractions