Steps
What is the first step when solving adding and subtracting fractions with unlike denominators?
Find the common denominator by listing the multiples.
2 1
____ + ____ =
3 4
11
___
12
1 1
____ - ___ =
3 4
1
___
12
3 2
2 ____ + 1 ___ =
4 3
4 and 5/12
What is a denominator?
The number below the line in a fraction.
What is the second step when adding and subtracting fractions with unlike denominators?
Create equivalent fractions with like denominators.
3 2
____ + ___ =
4 3
1 and 5/12
2 1
____ - ___ =
3 5
7/15
1 5
2 ____ + ___ =
4 6
6 and 1/12
What is a numerator?
The number above the line in a fraction.
What is the third step when adding and subtracting fractions with unlike denominators?
Add or subtract the fractions with like denominators.
4 3
____ + ___ =
5 4
1 and 11/20
1 1
____ - ___ =
2 5
3/10
1 4
3 ____ + ___ =
4 5
4 and 1/20
What does equivalent mean?
Equal in value or the same in value.
Tiggy climbed 1/6 of the cat tower and Brooks climbed 2/12 of the cat tower. Did they climb the same distance?
Yes because 1/6 and 2/12 are equivalent fractions.
2 4
____ + ___ =
3 6
1 and 1/3
4 2
____ - ___ =
5 3
2
___
15
1 4
3 ____ - ___ =
5 6
2 and 8/15
What does simplify mean?
To reduce a fraction to it's simplest form.
What is 12/30 simplified?
6/15
2 4
____ + ___ =
7 3
1 and 1/7
5 1
____ - ___ =
7 3
8
___
21
2 2
4 ____ - 3 ___ =
6 3
2/3
What is a common denominator?
The same denominator of two or more fractions.