n° By: Maaya and Anna What is the problem? How did we approach this? Adding Ratios The Answers A decorator buys pink paint from 2 different manufactures. Methods Used Maths: Mixing Paints Paint B is made up from red and white paint in the ratio 1:7 Paint A is made up from red and white paint in the ratio 1:3 He can mix the paints to produce a different shade of pink.

1:4

1:5

1:6 If Paint A and Paint B come in same size cans, what is the least number he would need of each type in order to produce pink paint containing red and white in the following ratios:

If you just add the ratios 1:3 and 1:7, you think the answer would be 3:10. This is not correct, because the answer is not accurate.

You cannot add ratios without changing one ratio, because the ratios will not be equivalent. 1

4 1 8 Trial and Improvement Table Each part has to be

the same in value 1 8 2 8 Table n° Now that we have changed the fraction 1/4, the ratios are now equivalent n° of tins A B 1 2:6 1:7 2 4:12 1:4 1:5 1:6 2:14 3 6:18 3:21 4 8:24 4:28 5 10:30 5:35 6:18 + 2:14 = 6 12:36 6:42 7 8:32

14:42 7:49 8 8 16:48 8:56 ... ... ... = 1:4 3 A + 2 B 2:6 +2:14 = 4:20 4 1:5 = 1 A + 2 B 2:6 + 6: 42 = 8:48 8 1:6 = 1 A + 6 B

### Present Remotely

Send the link below via email or IM

CopyPresent to your audience

Start remote presentation- Invited audience members
**will follow you**as you navigate and present - People invited to a presentation
**do not need a Prezi account** - This link expires
**10 minutes**after you close the presentation - A maximum of
**30 users**can follow your presentation - Learn more about this feature in the manual

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

### Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.

You can change this under Settings & Account at any time.

# Maths: Mixing Paint, Ratio.

No description

by Anna Baird
on 5 February 2013
Tweet