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Fraction Subtraction - Problem Simplification - Basic - One Changed Denominator (Level 3)

This math topic focuses on the subtraction of fractions with different denominators. The content hones skills on how to simplify basic problems by changing one denominator to make the fractions comparable. It involves setting up and solving fraction subtraction problems. Examples include subtracting fractions like 3/5 - 3/10 and 6/7 - 12/14. It's part of a broader unit on advanced fraction addition and subtraction.

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

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Sub. Problem Simplification - Basic - One Changed Denominator

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


Set up this fraction subtraction problem correctly

67−321\frac{6}{7} - \frac{3}{21}

Fraction Subtraction - Problem Simplification - Basic - One Changed Denominator Worksheet

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Math worksheet on 'Fraction Subtraction - Problem Simplification - Basic - One Changed Denominator (Level 3)'. Part of a broader unit on 'Fraction Addition and Subtraction - Advanced' Learn online: app.mobius.academy/math/units/fractions_addition_and_subtraction_advanced/
1
Set up this fraction subtraction problem correctly
A LaTex expression showing 3 over 7 - 6 over 21
a A LaTex expression showing 3 over 21 - 6 over 21
b A LaTex expression showing 12 over 21 - 6 over 21
c A LaTex expression showing 63 over 168 - 48 over 168
d A LaTex expression showing 66 over 154 - 42 over 154
e A LaTex expression showing 9 over 21 - 7 over 21
f A LaTex expression showing 9 over 21 - 6 over 21
2
Set up this fraction subtraction problem correctly
A LaTex expression showing 3 over 5 - 9 over 15
a A LaTex expression showing 9 over 15 - 9 over 15
b A LaTex expression showing 12 over 15 - 9 over 15
c A LaTex expression showing 48 over 80 - 45 over 80
d A LaTex expression showing 9 over 15 - 10 over 15
e A LaTex expression showing 3 over 15 - 9 over 15
f A LaTex expression showing 15 over 30 - 18 over 30
3
Set up this fraction subtraction problem correctly
A LaTex expression showing 2 over 3 - 2 over 6
a A LaTex expression showing 2 over 6 - 2 over 6
b A LaTex expression showing 4 over 6 - 2 over 6
c A LaTex expression showing 6 over 12 - 4 over 12
d A LaTex expression showing 14 over 21 - 6 over 21
e A LaTex expression showing 6 over 6 - 2 over 6
f A LaTex expression showing 4 over 6 - 3 over 6
4
Set up this fraction subtraction problem correctly
A LaTex expression showing 5 over 7 - 12 over 21
a A LaTex expression showing 15 over 21 - 12 over 21
b A LaTex expression showing 18 over 21 - 12 over 21
c A LaTex expression showing 5 over 21 - 12 over 21
d A LaTex expression showing 15 over 21 - 13 over 21
e A LaTex expression showing 105 over 168 - 96 over 168
f A LaTex expression showing 110 over 154 - 84 over 154
5
Set up this fraction subtraction problem correctly
A LaTex expression showing 3 over 5 - 5 over 15
a A LaTex expression showing 9 over 15 - 6 over 15
b A LaTex expression showing 12 over 15 - 5 over 15
c A LaTex expression showing 15 over 30 - 10 over 30
d A LaTex expression showing 48 over 80 - 25 over 80
e A LaTex expression showing 3 over 15 - 5 over 15
f A LaTex expression showing 9 over 15 - 5 over 15
6
Set up this fraction subtraction problem correctly
A LaTex expression showing 6 over 7 - 3 over 21
a A LaTex expression showing 18 over 21 - 4 over 21
b A LaTex expression showing 126 over 168 - 24 over 168
c A LaTex expression showing 18 over 21 - 3 over 21
d A LaTex expression showing 132 over 154 - 21 over 154
e A LaTex expression showing 6 over 21 - 3 over 21
f A LaTex expression showing 21 over 21 - 3 over 21
7
Set up this fraction subtraction problem correctly
A LaTex expression showing 2 over 5 - 5 over 15
a A LaTex expression showing 9 over 15 - 5 over 15
b A LaTex expression showing 2 over 15 - 5 over 15
c A LaTex expression showing 6 over 15 - 5 over 15
d A LaTex expression showing 6 over 15 - 6 over 15
e A LaTex expression showing 10 over 30 - 10 over 30
f A LaTex expression showing 32 over 80 - 25 over 80