Transcript y6_fractions_lesson

Lesson Objectives:
•To calculate a fraction of a
number mentally.
•To find a fraction of a quantity.
•To choose a way of working out
and give a reason why that method
was chosen.
Mental starter:
Using a spreadsheet to find
fractions of numbers.
Lesson Objectives:
•To find a fraction of a quantity.
•To choose a way of working out
and give a reason why that method
was chosen.
Example problem
3 of £2
4
Example problem
numerator
3 of £2
4
denominator
quantity
Method 1
3 of £2
4
First of all divide the quantity by the denominator
of the fraction: £2 divided by 4 = 50p
Next, multiply your answer by the numerator:
50p x 3 = £1.50
Method 2
3 of £2
4
First, convert the fraction to a decimal: 3/4 = 3
divided by 4 = 0.75
Next, multiply your answer by the quantity: 0.75 x
£2 = £1.50
•Which method is better?
Why?
•Is one method always
better than the other?
On your white board solve these problems using both
methods, discuss quietly with the person next to you which
method you think is better.
Be prepared to share what you’ve learnt.
Work out:
1. 3/4 of £20
2.
2/3 of £180
3. 3/4 of £28
4.
2/5 of £50
5. 4/5 of £60
6.
3/8 of £80
7. 5/8 of £80
8.
4/7 of £490
Lesson Objectives:
•To find a fraction of a quantity.
•To choose a way of working out
and give a reason why that method
was chosen.