Subtracting with integer chips | Integers: Addition and subtraction | 7th grade | Khan Academy

Описание к видео Subtracting with integer chips | Integers: Addition and subtraction | 7th grade | Khan Academy

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Let's model subtraction expressions using positive and negative integer chips. To subtract, we'll take away the appropriate number of chips. What if we don't have enough chips to take away? We can add as many zero pairs as we need, because they don't change the value of the expression.

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