ppt presentation #2 edu 210
DESCRIPTION
EDU 210 powerpoint presentation- Mariah McTaggartTRANSCRIPT
ADDING FRACTIONS
By: Mariah McTaggart
SCHEDULE
Diary- write what we remember about a fraction
View PowerPoint• Objective- To be able to add fractions by finding the least
common denominator, greatest common factor, and reducing. • How? • We will review what makes a fraction• View examples• Learn from power point• Practice as a class
Do problems on our own or in small groups
REVIEWA fraction has 3 parts to it
The ____________ is the top part which tells
you how much you actually have
The ______________ is the bottom half which
tells you how many pieces the whole is
divided into
The ___________, also known as fraction bar
means divided by
Numerator
Denominator
Vinculum
EXAMPLE
⅓+⅙=½
HOW?
First- you must find the least common
denominator (LCD)• Make a list of the multiples of both
denominators• Ex.1/3 - 3,6,9,12,18 1/6- 6,12,18
• Then find the the lowest number that is in both lists. In this case it is the 6
• Now that we have found the LCD, we have to multiply one or both sides by a number to make them equal the LCD. Then add them together
STEP BY STEP
1/3 x 2= 2/6
2/6 + 1/6= 3/6
RECALL• To reduce a fraction to its simplest form, you must find the Greatest Common Factor.• Then divide the numerator and denominator by the GCF.
To find the greatest common factor,
we make a list of all the multiples of the
numerator and denominator.
3 (numerator) - 1,3
6 (denominator) – 1,2,3,6
Now that we have found 3 to be the GCF; we divide both the numerator and denominator by 3.
3/3=16/3=2
Final Answer
1/2
YOUR TURN!
1) 1/5 + 1/3 =
2) 1/2 + 1/4 =
3) 2/7 + 1/2 =
4) 3/4 + 1/4 =
5) 1/9 + 4/9 =
6) 2/5 + 3/5 =
7) 4/9 +1/3 =
8) 2/6 +1/3 =
9) 1/3 +1/3 =
10) 3/7 + 4/7 =
8/15
3/4
11/14
1
5/9
1
7/9
2/3
2/3
1