[Math Lessons from the Blackboard] 5th Grade "Even/Odd Numbers and Multiples/Divisors" #1-11: Perspectives on Numbers that Support Fraction Calculati…

Even numbers, odd numbers, multiples, and divisors learned in the 5th grade.This is a unit where new terms appear one after ...

Why is the "Ladder Method" not taught in elementary school? Thinking about the least common multiple and what we really want to teach in arithmetic

Problems finding the least common multiple.For example,"Let's find the least common multiple of 6 and 8."In elementary school ...
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Least Common Multiple with Numbers

The least common multiple is the smallest number that two or more numbers will divide into evenly. This means that the LCM must contain all the prime factors of each number in question. Suppose we ...