Your SlideShare is downloading. ×
7-20-11
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

7-20-11

392
views

Published on

Published in: Education, Technology

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
392
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Tuesday July 20, 2011Hubbs Center - Math 2Agenda and Objectives
  • 2. Today’s Objectives... We will complete a real world math problem to show what we know about fractions. We will take notes on what we have learned to do with fractions. We will practice how to borrow when subtracting with fractions. We will practice word problems that require the addition and subtraction of fractions.
  • 3. Real World Math Problem Joannabought 1 2/9 of a pound of chocolates and ate 1/6 of a pound. How much was left? Anton bought a board that was 3 4/5 yards long. He cut off 1/2 of a yard. How much was left?
  • 4. Fractions Notes Rules for Adding Fractions: 1. Make sure the denominators are the same 2. Add the numerators. Put the answer over the same denominator. 3. Simplify (reduce) the fraction, if possible.– Example: 12/13 + 1/2
  • 5. Fractions Notes Rules for Subtracting Fractions: 1.Change mixed numbers to improper fractions. 2.Make sure the denominators are the same. 3. Subtract the numerators. Put the answer over the same denominator. 4. Simplify (reduce) the fraction, if possible. Example: 5/8 - 1/10
  • 6. Fractions Notes How to change an improper fraction into a mixed number: How to change a mixed number into an improper fraction:
  • 7. Fractions Notes How to find a common denominator so you can add or subtract: Example: 3/7 + 5/81. List the multiples for both denominators (multiply the number x1, x2, x3...)2. Find the smallest multiple they have in common (the same).3. Multiply each fraction, top and bottom, to get that multiple.4. Add or subtract the numerators. Remember: What you do to the bottom of the fraction, You have to do the same to the top!
  • 8. How to reduce or simplify fractions  To simplify a fraction, divide the top and bottom by the highest number that can divide into both numbers exactly.  Example: 24/108from: http://www.mathsisfun.com/simplifying-fractions.html
  • 9. How to borrow when you subtract fractions First, think about how you solve: 25 -17 Next, think about how you might solve: 3 1/3 - 1 2/3
  • 10. Addition and Subtraction Word Problems HW Sample Problems: