This math topic involves practicing fraction addition by finding the lowest common denominator (LCD). Students are presented with various pairs of fractions and are required to determine the appropriate LCD to successfully add them together. There are multiple choice answers provided for each problem, where students must select the correct LCD from the options. This basic exercise is part of an introductory unit on fraction addition and subtraction, aimed at developing foundational skills in handling fractions.

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

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Add. Find Common Denominator - Basic - One Changed Denominator

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What lowest common denominator would you use to add these fractions?

45+110\frac{4}{5} + \frac{1}{10}

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Fraction Addition - Find Common Denominator - Basic - One Changed Denominator Worksheet

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Math worksheet on 'Fraction Addition - Find Common Denominator - Basic - One Changed Denominator (Level 2)'. Part of a broader unit on 'Fraction Addition and Subtraction - Intro' Learn online: app.mobius.academy/math/units/fractions_addition_and_subtraction_intro/
1
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 4 over 7 + 1 over 14
a
14
b
9
c
12
d
21
e
22
f
8
2
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 1 over 5 + 7 over 15
a
16
b
19
c
8
d
14
e
15
f
11
3
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 1 over 2 + 5 over 6
a
2
b
6
c
11
d
5
e
1
f
3
4
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 1 over 7 + 6 over 14
a
12
b
8
c
14
d
17
e
15
f
18
5
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 2 over 5 + 1 over 10
a
10
b
3
c
12
d
14
e
13
f
6
6
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 4 over 5 + 1 over 10
a
17
b
10
c
6
d
11
e
4
f
18
7
What lowest common denominator would you use to add these fractions?
A LaTex expression showing 1 over 7 + 5 over 14
a
13
b
21
c
23
d
9
e
6
f
14