Percentages: a visual approach
£200 0 10 20 30 40 50 60 70 80 90 100
£200 ??? 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? How did you work it out? 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? How did you work it out? Write down the steps in detail 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? How did you work it out? Write down the steps in detail Try the next one… 0 10 20 30 40 50 60 70 80 90 100
The next problem…
£140 0 10 20 30 40 50 60 70 80 90 100
£140 ??? 0 10 20 30 40 50 60 70 80 90 100
£140 ??? ??? 0 10 20 30 40 50 60 70 80 90 100
It gets better   …
£180 0 10 20 30 40 50 60 70 80 90 100 110 120
£180 ??? 0 10 20 30 40 50 60 70 80 90 100 110 120
£180 ??? ??? 0 10 20 30 40 50 60 70 80 90 100 110 120
Another one…
£352.50 £??? 0 10 20 30 40 50 60 70 80 90 100 110 120
£352.50 £??? £??? 0 10 20 30 40 50 60 70 80 90 100 110 120
There’s more…
A laptop is marked as 10% off in a sale. The price is £540. What was the original cost of the laptop?
£540 A laptop is marked as 10% off in a sale. The  sale  price is £540. What was the original cost of the laptop? 0 10 20 ...
£540 A laptop is marked as 10% off in a sale. The  sale  price is £540. What was the original cost of the laptop? £??? 0 1...
The last one…
Algernon has received a 5% pay rise. His new wages are £18 275. What were Algernon’s wages  before  the pay rise? £18 275 ...
Upcoming SlideShare
Loading in …5
×

Reverse Percentages: a visual approach

4,010 views

Published on

GCSE Maths reverse percentages questions using a ruler and the length of shapes. I\'m trying this approach to see if I can cut out some of the verbal issues that arise in \'story problems\'

Published in: Education, Technology
2 Comments
1 Like
Statistics
Notes
  • This is how math should be taught at schools to improve the understandability of math for visual learners.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Quite well made presentation, congratulations!
    http://www.bathroomsinkconsoles.net/
    http://www.bathroomsinkconsoles.net/category/bathroom-sink-consoles/
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total views
4,010
On SlideShare
0
From Embeds
0
Number of Embeds
303
Actions
Shares
0
Downloads
62
Comments
2
Likes
1
Embeds 0
No embeds

No notes for slide

Reverse Percentages: a visual approach

  1. 1. Percentages: a visual approach
  2. 2. £200 0 10 20 30 40 50 60 70 80 90 100
  3. 3. £200 ??? 0 10 20 30 40 50 60 70 80 90 100
  4. 4. £200 ??? ??? 0 10 20 30 40 50 60 70 80 90 100
  5. 5. £200 ??? ??? How did you work it out? 0 10 20 30 40 50 60 70 80 90 100
  6. 6. £200 ??? ??? How did you work it out? Write down the steps in detail 0 10 20 30 40 50 60 70 80 90 100
  7. 7. £200 ??? ??? How did you work it out? Write down the steps in detail Try the next one… 0 10 20 30 40 50 60 70 80 90 100
  8. 8. The next problem…
  9. 9. £140 0 10 20 30 40 50 60 70 80 90 100
  10. 10. £140 ??? 0 10 20 30 40 50 60 70 80 90 100
  11. 11. £140 ??? ??? 0 10 20 30 40 50 60 70 80 90 100
  12. 12. It gets better  …
  13. 13. £180 0 10 20 30 40 50 60 70 80 90 100 110 120
  14. 14. £180 ??? 0 10 20 30 40 50 60 70 80 90 100 110 120
  15. 15. £180 ??? ??? 0 10 20 30 40 50 60 70 80 90 100 110 120
  16. 16. Another one…
  17. 17. £352.50 £??? 0 10 20 30 40 50 60 70 80 90 100 110 120
  18. 18. £352.50 £??? £??? 0 10 20 30 40 50 60 70 80 90 100 110 120
  19. 19. There’s more…
  20. 20. A laptop is marked as 10% off in a sale. The price is £540. What was the original cost of the laptop?
  21. 21. £540 A laptop is marked as 10% off in a sale. The sale price is £540. What was the original cost of the laptop? 0 10 20 30 40 50 60 70 80 90 100
  22. 22. £540 A laptop is marked as 10% off in a sale. The sale price is £540. What was the original cost of the laptop? £??? 0 10 20 30 40 50 60 70 80 90 100
  23. 23. The last one…
  24. 24. Algernon has received a 5% pay rise. His new wages are £18 275. What were Algernon’s wages before the pay rise? £18 275 ??? 0 10 20 30 40 50 60 70 80 90 100 110 120

×