Adding Fractions
2/7 + 3/7
5/7
5/8 - 3/8
1/4
9/4
2 1/4
2 1/3
7/3
What is a numerator in a fraction?
The top number
3/4 + 1/8
7/8
7/10 - 2/5
3/10
15/6
2 1/2
4 2/5
22/5
What is a denominator in a fraction?
The Bottom number
2/5 + 3/10
7/10
4/9 - 1/6
5/18
23/5
4 3/5
6 3/8
51/8
What does it mean for a fraction to be improper?
The numerator has a greater value than the denominator
7/6 + 11/12
2 1/12
17/12 - 5/6
7/12
50/9
5 5/9
9 7/10
97/10
What is a mixed number and how is it related to an improper fraction?
A whole number and fraction combined.
Every mixed number can be written as an improper fraction.
2 1/3 + 1 5/6
4 1/6
3 1/4 - 1 5/6
1 5/12
125/12
10 5/12
12 11/12
155/12
What does the least common denominator (LCD) mean, and why is it important when adding or subtracting fractions?
The least common denominator (LCD) is the smallest number that both denominators divide into evenly.
It is important because fractions must have the same denominator to be added or subtracted.