1 / 23

The 2nd rate is 3x (times) the 1st rate

The 2nd rate is 3x (times) the 1st rate. Yes. Same unit rate =. method 1) unit rate. method 2) see if equal. Proportions. 2009. Erase to reveal. A proportion is an equation 
showing two equal ratios. Find the missing number, be prepared to 
share your strategy with the class. 15 = x

artan
Download Presentation

The 2nd rate is 3x (times) the 1st rate

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The 2nd rate is 3x (times) the 1st rate Yes. Same unit rate =

  2. method 1) unit rate method 2) see if equal

  3. Proportions 2009

  4. Erase to reveal A proportion is an equation 
showing two equal ratios.

  5. Find the missing number, be prepared to 
share your strategy with the class. 15 = x 40 = 8 1.

  6. Find the missing number, be prepared to 
share your strategy with the class. 2. 4 = 12 x 24

  7. Find the missing number, be prepared to 
share your strategy with the class. 3. 4 = 5 7 x

  8. Erase to reveal A proportion can be solved using three different methods... 1.unit rate 2.equal fractions 3. cross products

  9. The school was holding a food drive. The ratio of cans 
to boxes was 3 to 4. If Austin counted 120 cans how 
many boxes should he have? b How do I use proportions? 3 cans =120 cans 4 boxes x boxes 160 boxes The school was holding a food drive. The ratio of cans 
to boxes was 3 to 4. If Austin counted 120 cans how 
many boxes should he have?

  10. Trading Stickers Elephant Stickers Dog Stickers Cat Stickers If you traded 18 elephant stickers, how many dog stickers could you get? If you traded in 30 dog stickers, how many cat stickers could you get? If you had enough money for 20 cat stickers, how many elephant stickers could 
you afford to buy? If you traded in 15 dog stickers, how many elephant stickers could you get? If you traded in 42 elephant stickers for 38 cat stickers, did you get a 
good deal? Why or Why not?

  11. Question move cup to reveal answer Hayley was going to make punch for the party the recipe 
she had made 12 servings and called for 3 cups of grape 
juice. Hayley wanted to make enough for 36 servings, how 
much grape juice should she plan to add to the punch? 12servings = 36 servings 3 cups = y cups 36 x 3 = 12 x Y 108 = 12Y Y = 9 cups

  12. Solve these word problems on these next two pages, using direct proportion. A factory makes 5 bicycles per hour. How many bicycles can they make in 2 hours? 10 bicycles One chocolate bar costs 1 dollar. How much would 5 bars cost? $5 A taxi goes 10 miles in 20 minutes. How far does it travel in one hour? 30 miles

  13. The vet says I have to give Honey (my very adorable, 
somewhat annoying Golden 
Retriever) some vitamins. 
The vet says she should get 
1 teaspoon for every 20 
pounds of her weight. 
Honey is a big girl she 
weighs 75 pounds. How much medicine should she 
get? move 
Honey to 
reveal 
answer The 1/20=x/75 3.75 t.

  14. the 2nd ratio is 3x the 1st ratio 1st way: unit rate 2nd way: equal fractions 3rd way: cross products

  15. http://studyjams.scholastic.com/studyjams/jams/math/algebra/proportion.htmhttp://studyjams.scholastic.com/studyjams/jams/math/algebra/proportion.htm

  16. 6-3 Grade: «grade» «subject» Subject: «date» Date:

  17. 1 Yes No

  18. 2 Yes No

  19. 3 Yes No

  20. 4 Yes No

More Related