1 / 8

Ratios

Ratios . Chapter 4.1 B. What is a Ratio?. A comparison of two numbers using DIVISION! . 2 sharks out of 5 fish. Can be written 4 different ways: . 2 5. 2 : 5. 2 to 5. 2 out of 5. Just make sure it is in SIMPLEST form!!!. Lets try some…. 3 sailboats to 6 motor boats. 3 6. 1 2.

lark
Télécharger la présentation

Ratios

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. Ratios Chapter 4.1 B

  2. What is a Ratio? A comparison of two numbers using DIVISION! 2 sharks out of 5 fish Can be written 4 different ways: 2 5 2 : 5 2 to 5 2 out of 5 Just make sure it is in SIMPLEST form!!!

  3. Lets try some… 3 sailboats to 6 motor boats 3 6 1 2 ÷ 3 = 1 to 2 1 out of 2 1 : 2

  4. Here’s another… 6 blue jays to 18 cardinals 6 18 1 3 ÷ 6 = 1 to 3 1 out of 3 1 : 3

  5. What about THIS one??? There are 10 boys and 12 girls, find the ratio of boys to the total amount of kids. 10 22 5 11 ÷ 2 = 5 to 11 5 out of 11 5 : 11

  6. Make sure to read word problems!!! In the St. Lucie West band there are 15 trumpets and 9 trombones. Find the ratio of trombones to trumpets. The story says trombones FIRST!!! 9 15 3 5 ÷ 3 = 3 to 5 3 out of 5 3 : 5

  7. You can use ratios to find total amounts too… There are 21 students in class. If the ratio of Boys to Girls is 3:4, what is the actual number of Boys & Girls? 2nd Now that you know 7 goes into 21 3 times MULTIPLY both numbers by 3! 1st Since the ratio is 3 to 4 that equals 7 students, notice anything about 7 and 21? 3rd 3 x 3 = 9 and 4 x 3 = 12 so there are 9 boys & 12 girls …this should ADD up to 21!!!

  8. Try this one by yourself There are 55 animals at the shelter. If the ratio of dogs to cats is 2 to 3, how many dogs & cats are there? 2nd Now that you know 5 goes into 55 11 times, MULTIPLY both numbers by 11! 1st Since the ratio is 2 to 3 that equals 5 animals, notice anything about 5 and 55? 3rd2 x 11 = 22 and 3 x 11 = 33 so there are 22 dogs & 33 cats …this should ADD up to 55!!!

More Related