This math topic focuses on practicing skills in fraction addition with a focus on finding the missing value, specifically when both fractions have different denominators. It is designed for advanced learners who are already familiar with mixed number operations and how to manipulate and add fractions with unlike denominators. Each question requires the student to identify the correct fraction needed to complete an addition equation accurately. The problems provide a diverse set of fraction combinations and outcomes which help in enhancing the understanding of fractional addition and numerical relationship concepts.

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

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Fraction Addition - Missing Value (Mixed) - Two Changed Denominators Worksheet

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Math worksheet on 'Fraction Addition - Missing Value (Mixed) - Two Changed Denominators (Level 2)'. Part of a broader unit on 'Fraction Addition and Subtraction, Mixed - Advanced' Learn online: app.mobius.academy/math/units/fractions_addition_and_subtraction_mixed_advanced/
1
Find the fraction that makes this equation correct
A LaTex expression showing \ sub \ sub \ _ \;+\;1 over 3 = 113 over 21
a A LaTex expression showing 5 over 9
b A LaTex expression showing 12 over 7
c A LaTex expression showing 12 over 3
d A LaTex expression showing 116 over 21
e A LaTex expression showing 115 over 22
f A LaTex expression showing 2
2
Find the fraction that makes this equation correct
A LaTex expression showing 31 over 2 \;+\; \ sub \ sub \ _ = 43 over 14
a A LaTex expression showing 143 over 4
b A LaTex expression showing 56 over 11
c A LaTex expression showing 5 over 7
d A LaTex expression showing 45 over 7
e A LaTex expression showing 219 over 21
f A LaTex expression showing 42 over 7
3
Find the fraction that makes this equation correct
A LaTex expression showing 21 over 2 \;+\; \ sub \ sub \ _ = 45 over 14
a A LaTex expression showing 72 over 9
b A LaTex expression showing 1025 over 28
c A LaTex expression showing 16 over 7
d A LaTex expression showing 41 over 7
e A LaTex expression showing 45 over 7
f A LaTex expression showing 42 over 7
4
Find the fraction that makes this equation correct
A LaTex expression showing 34 over 11 \;+\; \ sub \ sub \ _ = 323 over 33
a A LaTex expression showing 324 over 31
b A LaTex expression showing 53 over 121
c A LaTex expression showing 1 over 3
d A LaTex expression showing 145 over 11
e A LaTex expression showing 326 over 33
f A LaTex expression showing 19 over 10
5
Find the fraction that makes this equation correct
A LaTex expression showing \ sub \ sub \ _ \;+\;8 over 11 = 367 over 77
a A LaTex expression showing 354 over 85
b A LaTex expression showing 36 over 7
c A LaTex expression showing 368 over 77
d A LaTex expression showing 336 over 37
e A LaTex expression showing 31 over 7
f A LaTex expression showing 47 over 72
6
Find the fraction that makes this equation correct
A LaTex expression showing 22 over 5 \;+\; \ sub \ sub \ _ = 311 over 15
a A LaTex expression showing 11 over 3
b A LaTex expression showing 68 over 75
c A LaTex expression showing 27 over 27
d A LaTex expression showing 33 over 5
e A LaTex expression showing 311 over 15
f A LaTex expression showing 32 over 17
7
Find the fraction that makes this equation correct
A LaTex expression showing \ sub \ sub \ _ \;+\;26 over 7 = 65 over 14
a A LaTex expression showing 214 over 17
b A LaTex expression showing 64 over 7
c A LaTex expression showing 63 over 7
d A LaTex expression showing 31 over 2
e A LaTex expression showing 188 over 49
f A LaTex expression showing 62 over 7