Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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Commutative, Associative - Problem 2

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Commutative, Associative - Problem 1

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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If you are asked to multiply numbers, it is easier to multiply by 10 or 100 if possible. Look to re-group or re-order the multiplication factors to make your mental calculations easier. The same is true with addition- you can add in whatever order you want to, so add numbers that give you factors of 10 if possible.

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