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Grade 6 gcf and lcm worksheets
6.NS.B.4 Number and operations
Printable gcf and lcm worksheets for grade 6, aligned to Common Core standard 6.NS.B.4. Greatest common factor, least common multiple.
Make a worksheet on this skillFree, instant, no signup. Choose 5–40 problems, three difficulty levels, and a printable answer key.
Sample problems
- What is the LCM of 36 and 16? 144
- What is the GCF of 28 and 25? 1
- What is the LCM of 14 and 46? 322
- What is the LCM of 26 and 4? 52
- What is the GCF of 29 and 19? 1
- What is the LCM of 45 and 19? 855
- What is the LCM of 21 and 17? 357
- What is the LCM of 31 and 30? 930
These eight are one sample at medium difficulty — the generator makes a different set every time.
A worked example
What is the LCM of 36 and 16? 144
- First find the GCF of 36 and 16: 4
- LCM = 36 × 16 ÷ GCF
- 36 × 16 = 576
- 576 ÷ 4 = 144
Every problem on the answer key can show its steps like this — turn on “Show steps” before downloading.
About these worksheets
Number work rewards repetition with different numbers rather than the same sheet twice. Every sheet is generated fresh, so you can print a new one on the same skill as often as you need — different numbers, same difficulty.
Pick how many problems you want and whether they should be easy, medium or hard, then download a PDF with a matching answer key. The key can show the worked steps for every problem, which is what a parent needs to see where a wrong answer went wrong.
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