Complex LCM: Fluency & Practice
Mathematics
Grade 6
11 questions
~22 mins
1 views0 downloads
About This Worksheet
A worksheet focused on developing procedural mastery and understanding of adding fractions with unlike denominators using complex least common multiples (LCM). Includes practice, reasoning, real-world, and extension problems.
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Full preview • 11 questions
Complex LCM: Fluency & Practice
Subject: MathematicsGrade: Grade 6
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Untitled Worksheet
Grade Grade 6
A
Practice Questions
Answer all questions. Show your working in the grid spaces provided.
1.
Find the least common multiple of 8, 12, and 20 to add the fractions 3/8 + 5/12 + 7/20. Show your calculation.
[3 marks]2.
Calculate the sum of 5/18 and 7/24. Use the complex LCM method to find the common denominator.
[2 marks]3.
Add 4/15, 7/20, and 9/35 by finding the least common multiple of their denominators. Write the combined fraction.
[3 marks]4.
Determine the LCM of 6, 9, and 14, and then add the fractions 2/6 + 3/9 + 4/14. Show your working.
[3 marks]5.
A recipe requires 1/4 cup, 1/6 cup, and 1/8 cup of ingredients. Find the smallest amount that can be measured using common cups, by adding these fractions.
[4 marks]6.
What is the complex LCM of 10, 15, and 25? Use this to add 2/10 + 3/15 + 4/25.
[3 marks]7.
Construct a fraction sum using denominators 12, 18, and 24. Find the complex LCM and add 7/12 + 5/18 + 11/24. Show your work.
[4 marks]8.
Identify a common mistake when adding 3/16 + 5/24 + 7/32 without properly finding the LCM. Explain and correct the mistake.
[4 marks]9.
Find the sum of 1/9 + 1/12 + 1/15, using the complex LCM of denominators. Write the simplified total.
[3 marks]10.
Challenge: Add 7/22 + 9/26 + 11/33. Use complex LCM to find the sum, then simplify.
[4 marks]11.
Identify and fix the mistake: a student adds 2/5 + 3/10 + 4/15 by assuming denominators are directly compatible without finding LCM.
[4 marks]Quick Actions
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet