Free Printable Least Common Multiple (LCM) Worksheets for Grade 4

Students are typically introduced to the concepts of multiples and factors in 3rd and 4th grade. While formal LCM instruction is often emphasized in 5th and 6th grade, these Grade 4 worksheets provide an excellent introduction to the foundational skill of finding common multiples with smaller, more manageable numbers.

For 4th graders, the most effective method is "listing multiples." Have students list out the first several multiples of each number and then circle the first one they have in common. Using a hundreds chart or number line can also provide a strong visual aid to help them see the pattern of common multiples.

Focus on finding the LCM of two small numbers, typically under 12. This reinforces multiplication facts while building the new concept. Simple word problems, like figuring out when two friends on different running schedules will next run on the same day, can make the practice more engaging and concrete.

At this age, students often stop at the first multiple they find for one number, rather than looking for a multiple that is common to both. They might also confuse "multiple" with "factor." Consistent practice with the vocabulary and the process of listing and comparing is key to overcoming this.

This worksheet can be used for guided practice, independent work, or homework. Assign it digitally on Wayground for automatic grading, or download the printable PDF for hands-on paper practice. Each worksheet includes a full answer key to make checking work simple and efficient.

In 4th grade, Common Core standards focus on gaining familiarity with factors and multiples (4.OA.B.4). These LCM worksheets build directly on that standard. This early exposure prepares students for the more formal work with fractions in 5th grade, where finding a common denominator is a critical application of LCM.