1 / 6

Proportion Solving - Chapter 8, Lesson 2

This lesson focuses on solving proportions using cross products. Students will learn how to determine if a pair of ratios form a proportion and how to solve proportions by cross-multiplying and solving for the variable.

carolynmartin
Download Presentation

Proportion Solving - Chapter 8, Lesson 2

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. Objective Students will solve proportions Chapter 8, lesson 2 (8-2).

  2. Vocabulary: • Proportion • Cross products

  3. Steps: • To determine whether each pair of ratios form a proportion you must do the following: * Cross multiply (N with D). * If products are =, they form a proportion. * Write final answer after showing all work.

  4. Example: 2/13 , 4/26 (problem) 13 x 4 = 26 x 2 (cross X) 52 = 52 (look at answers) yes, it forms a proportion

  5. Steps continued: • To solve each proportion, you must do the following: * Cross multiply (N with D) * Solve for the variable (letter) by dividing both sides by the # in front of the letter. * Write the final answer as Z = (letter = answer).

  6. Example: 5/9 = w/54 (problem) 9 x W = 54 x 5 (cross M) 9W = 270 9w/9 = 270/9 (divide both sides by 9) W = 30 (answer)

More Related