The process
What are the 2 steps when adding fractions with a common denominator?
Add the numerators, and use the same denominator.
2/12 + 4/12 =
6/12
10/14 - 2/14
8/14
3/5 + 1/7 =
LCD = 35
12/5
2 and 2/5
What are the steps when subtracting fractions with common denominators?
Subtract the numerators and use the same common denominator.
30/40 + 2/40 =
32/40
20/16 - 11/16 =
9/16
2/3 + 3/9 =
LCD = 18
27/5
5 and 2/5
What does it mean when the numerator and denominator are the same?
It means the fraction = 1 whole.
9/21 +12/21 =
1
120/500 - 100/500 =
20/500
5/10 + 1/3 =
LCD = 30
37/6
6 and 1/6
How do you change an improper fraction to a mixed number fraction?
Divide the numerator by the denominator. You get a whole number and then the remainder becomes the numerator, and the denominator stays the same.
20/24 + 4/24 =
1
360/1000 - 60/1000 =
300/1000
1/8 + 3/5 =
LCD = 40
85/10
8 and 5/10
How do you change a mixed number to an improper fraction?
Multiply the denominator x whole number = numerator. The denominator remains the same.
14/100 + 46/100 =
60/100
83/100 - 17/100 =
66/100
8/25 + 1/10 + 1/2 =
LCD = 50
122/11
11 and 1/11