Introduction to Least Common Multiple

Least Common Multiple of two or more numbers is the smallest number which is divisible by all the given numbers. 

For example; consider 2 and 3 and we look  for number which are divisible by both 2 and 3 (also known as multiples of 2 and 3); 

4 is divisible by 2 but not by 3 hence not common multiple, 5 is divisible by none of 2 and 3, 6 is divisible by both 2 and 3 hence 6 is the first common multiple of 2 and 3. Also there is no other number smaller than 6 which is divisible by both 2 and 3 therefore 6 is the least common multiple.

Least Common Multiple is also known as lcm in short form. Following is the small activity sheet I created on this concept;

Below are the links to 2nd grade and 3rd grade math pages, where you can print all the content for 2nd and 3rd grade math students;

2ND GRADE MATH CORE CURRICULUM

3RD GRADE MATH CORE CURRICULUM