My favorite way to simplify fractions is by working through a list or prime numbers, checking if both numerator and denominator divide by each larger prime. I like this method because it makes simplifying fractions super concrete for students who need it. It also helps eliminate errors that can occur when a factor is missed. Students who aren't as confident with their division facts can even use a calculator (or divisibility rules) to check each prime.

*why*this method works. So I made the video on the right showing how to simplify fractions using visual models. Dividing both the numerator and denominator by 2, 3, 5, etc. is the same as dividing by 1 over and over again. Except in our case, those ones are in disguise as 2/2, 3/3, etc.

Simplifying fractions flowchart |

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