I explain how we can simplify before we multiply fractions, and also why we are allowed to do so. This is a great "trick" to learn for grades 5-6 math because then, the numerators and the denominators become smaller numbers and the multiplications become easier and faster to do.
This is also explained in my book Math Mammoth Fractions 2 at http://www.mathmammoth.com/fractions_2.php
It is available both as an instant download ($5.75) and as a printed copy.
To simplify before the multiplication, just find common factors in the numerators and the denominators
Tagged under: fractions,simplify,multiplication
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