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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Addition and Subtraction - Problem 3

Addition and Subtraction - Problem 2

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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A number line is a way to represent the order of numbers- numbers are larger as we move right, and smaller as we move left. You can think of an addition or subtraction problem on a number line, as well: the first value represents where you start on the number line, and FROM THERE you count the number of spaces of your next value. Move right to represent addition (or - - , which is like the opposite of subtraction) and move left to represent subtraction

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