When simplifying fractions, or when multiplying fractions, you can cross out, or cancel, common factors from the numerator and the denominator. It can help to write the numerator and the denominator as (something times something), in other words to factor them. I show this process using multiple examples, going from simple to more complex.
In the 2nd part, we learn how to cross-cancel (simplify criss-cross):
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See more 6th grade math videos:
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Self-teaching worktext to learn about multiplication, division, and factoring:
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Check out Math Mammoth grade 6 curriculum here:
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