WorksheetsFind the Least Common Denominator
Total questions: 10
Name
Class
Date
Answer KeyFind the Least Common Denominator
Total questions: 10
1.
c) 9
2.
b)
21
3.
b)
12
4.
a)
6
5.
a)
6
6.
c)
28
7.
a)
15
8.
c)
10
9.
a)
45
10.
d)
18
Find the Least Common Denominator
10 questions
5th - 5th Grade
Mathematics
Find the Least Common Denominator is a Grade 5 mathematics worksheet that helps students identify the least common denominator for pairs of fractions. Through 10 multiple-choice questions, students determine the smallest shared denominator for fractions such as 1/9 and 2/3, 6/7 and 3/4, and 7/9 and 1/6. One item also asks students to recognize a number that cannot serve as a common denominator, reinforcing the difference between possible common denominators and the least one. This free printable worksheet supports practice with identifying shared multiples and selecting the smallest valid denominator before adding, subtracting, or comparing fractions. Use it for independent work, guided review, math-center practice, or a quick check of understanding after introducing least common denominators. The worksheet includes a complete answer key so teachers can review the multiple-choice results efficiently and address errors with targeted explanation.
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FAQs
What does the Find the Least Common Denominator worksheet cover?
This Grade 5 worksheet covers identifying the least common denominator for pairs of fractions through 10 multiple-choice questions. Students select the smallest shared denominator, including cases where one denominator is a multiple of the other and cases such as sevenths and fourths that require finding a larger shared multiple. One question asks which number could not be a common denominator, helping students distinguish any valid common denominator from the least one.
How can I use this worksheet to teach students to find the least common denominator?
Model how to list multiples of each denominator, identify the first value shared by both lists, and then work through one of the worksheet’s fraction pairs as a class. Ask students to explain why a larger common denominator may be valid but is not the least common denominator. Before independent completion, discuss the wording of the item asking which number could not be a common denominator so students know to look for a value that is not divisible by both original denominators.
What mistakes should I watch for when students complete this worksheet?
Students may choose one of the original denominators without checking whether it is a multiple of the other, as in the pairs involving 7 and 4 or 5 and 9. They may also select a larger common denominator instead of the least one, or reverse the logic on the question asking which value could not be a common denominator. Have students verify each choice by checking whether both denominators divide it evenly.
How do I assign and grade this least common denominator worksheet?
The worksheet is available as a printable PDF and as a digital quiz on Wayground, and it includes a complete answer key for all 10 multiple-choice questions. For printable submissions, scan student work with the Wayground for Teachers app to streamline grading. The PDF option also supports classrooms that are reducing screen time while students practise finding least common denominators.
How can I differentiate this worksheet for my students?
Use the worksheet’s Advanced Settings to adjust font spacing or increase the font size so the fraction pairs and answer choices are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language when those options support access to the least common denominator practice. These changes apply to the worksheet file itself, including its multiple-choice items.
Where can I find more worksheets like this on Wayground?
Wayground offers a comprehensive collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to help students master essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.