This topic focuses on practicing the skill of finding the least common denominator (LCD) necessary for the addition of fractions with different denominators. Each question presents two fractions and challenges the student to identify the correct LCD from multiple choices to correctly add these fractions. The worksheet is aimed at enhancing the student's ability to handle fractions in addition operations, emphasizing finding a common denominator where both denominators need to be adjusted.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Fraction Addition - Find Common Denominator - Mixed - Two Changed Denominators Worksheet

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Fraction Addition - Find Common Denominator - Mixed - Two Changed Denominators
1
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 31 over 3 + 1 over 2
a
6
b
5
c
13
d
2
e
4
f
15
2
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 11 over 2 + 1 over 3
a
8
b
3
c
7
d
6
e
9
f
11
3
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 11 over 2 + 1 over 5
a
9
b
18
c
4
d
10
e
12
f
1
4
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 21 over 3 + 1 over 2
a
9
b
5
c
13
d
3
e
2
f
6
5
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 21 over 5 + 1 over 2
a
18
b
1
c
8
d
12
e
3
f
10
6
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 11 over 5 + 1 over 7
a
11
b
59
c
50
d
26
e
35
f
53
7
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 21 over 5 + 1 over 7
a
35
b
53
c
62
d
32
e
14
f
26
8
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 11 over 5 + 1 over 3
a
17
b
12
c
15
d
22
e
20
f
14