1 / 4

Adding and Subtracting Fractions With Common Denominators

Adding and Subtracting Fractions With Common Denominators. 2 + 3 = 2+3 = 5 7 7 7 7 When the denominator (the bottom part of the fractions) is the same, all we need to do is add or subtract across the top and leave the bottom unchanged.

Ava
Download Presentation

Adding and Subtracting Fractions With Common Denominators

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. Adding and Subtracting Fractions With Common Denominators • 2 + 3 = 2+3 = 5 7 7 7 7 When the denominator (the bottom part of the fractions) is the same, all we need to do is add or subtract across the top and leave the bottom unchanged. Solve: 4 + 3 = 1 + 2 = 9 9 5 5

  2. With Unlike Denominators • 1 + 2 = The first step is to find the lowest 3 5 common denominator. That is the smallest number that the two “bottoms” of the fractions will go into. In this case it is 15. We change the original question to two fractions with the same denominator (15) 1+ 21 = 52 = 6 so 5 + 6 = 11 3 5 3 15 5 15 15 15 15

  3. Adding and Subtracting Fractions • Solve: • ¼ + 2/3 = • What is the lowest common denominator? • ¼ = and 2/3 = • So, rewrite the original question as:

  4. Adding and Subtracting Fractions • Solve 1/6 + 2/5

More Related