1 / 15

Lesson 57

Lesson 57. Adding and Subtracting Fractions Three Steps. Notes. Mental Math. Links. Activity. Proficiency. Homework. Fact Test. Mental Math. Count by 12’s from 12 to 144 8 x 425 465 + 250 150 + 49 $9.75 - $3.50 Double 4 ½ 600/30 2 x 2, x 2, x 2, x 2, x 2, ÷ 8, ÷ 8.

anthony-finley
Download Presentation

Lesson 57

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. Lesson 57 Adding and Subtracting Fractions Three Steps

  2. Notes Mental Math Links Activity Proficiency Homework Fact Test

  3. Mental Math • Count by 12’s from 12 to 144 • 8 x 425 465 + 250 • 150 + 49 $9.75 - $3.50 • Double 4 ½ 600/30 • 2 x 2, x 2, x 2, x 2, x 2, ÷ 8, ÷ 8

  4. Step 1: Put the problem into the correct shape or form if it is not already. (When adding and subtracting, the correct form is with common denominators). Step 2: Perform the operation indicated. (Adding, Subtracting, Multiplying, or Dividing). Step 3: Simplify the answer if possible. (Reduce the fraction or write an improper fraction as a mixed number).

  5. Example #1 Add: 1/2 + 2/3 Step 1: Shape: write the fraction with common denominators. 1/2 = n/6 = 3/6 + 2/3 = + n/6 = + 4/6 Step 2: Operate: add the renamed fractions. 3/6 + 4/6 7/6 Step 3: Simplify: convert the improper fraction to a mixed number 7/6 = 1 1/6 Next

  6. Example #2 Subtract: 5/6 - 1/3 Step 1: Shape: write the fraction with common denominators. 5/6 = n/6 = 5/6 - 1/3 = - n/6 = - 2/6 Step 2: Operate: add the renamed fractions. 5/6 - 2/6 3/6 Step 3: Simplify: convert the improper fraction to a mixed number 3/6 = 1/2

  7. Adding Fractions http://www.aaamath.com/B/g66k_ax1.htm Subtracting Fractions http://www.aaamath.com/B/g66l_sx1.htm Adding and Subtracting Fractions http://www.math.com/school/subject1/lessons/S1U4L6GL.html

  8. Activity Jermaine was thinking of two different positive odd numbers whose average was 15. Each number contains two digits. Find two pairs of numbers of which Jermaine could have been thinking.

  9. Lesson 57 Practice A-H Complete #’s 1-10

  10. Fact Test H

  11. 5 0 :3 0 2/3 + 3/4 • 5/7 • 5/13 • 1 1/2 • 1 5/12 • None of the above

  12. 5 0 :3 0 5/6 – 1/2 • 1/3 • 1 • 1/2 • 4/12 • None of the above

  13. 5 0 :3 0 5/12 – 1/6 = • 1/2 • 1/4 • 1/3 • 2/3 • None of the above

More Related