Maryland Math 6.NOS.B.4.b
The Standard
- 6.NOS.B.4
- Identify the common factors and multiples of two whole numbers.
Identify the least common multiple of two whole numbers within 12.
Maryland College and Career Ready Standards for Mathematics (2025) · COMPUTE FLUENTLY WITH MULTI-DIGIT NUMBERS AND FIND COMMON FACTORS AND MULTIPLES.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students list multiples of two numbers from 1 to 12. They find the smallest positive number on both lists.
What Mastery Looks Like
- For 8 and 12, a student lists multiples until both lists reach 24. They explain why 48 is also a common multiple but is not the least.
Common Misconceptions
- Students may multiply the two numbers and stop, even when there is a smaller common multiple. They may also list factors instead of multiples.
How to Assess It
- Exit ticket: Find the least common multiple of 6 and 8. Show both multiple lists up to their first match.
Lesson moves
Ways to Teach It
Give students 24 counters. Have them make groups of 4, then groups of 6, and find the first total that works for both.
Ask, 'Why is 24 a common multiple of 4 and 6 but not the least?' Have students write one sentence.
Deal two number cards from 2 to 12. Partners race to list multiples and circle the first match.
Start two classroom timers together, one set for 3 minutes and one for 5. Ask when they will next beep together.
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Printable 6.NOS.B.4.b Worksheet
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Related Standards
- 4.NOS.C.8.b
Determine whether a given whole number in the range of 1–100 is a multiple of a one-digit number.
- 6.NOS.B.4
Identify the common factors and multiples of two whole numbers.
- 4.NOS.B.6
Divide whole numbers with up to four-digit dividends and one-digit divisors with and without remainders.
- 6.NOS.B.4.a
Identify the greatest common factor of two whole numbers within 100.
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