Interpreting numeric expressions example (Full video)

Khan Academy
Supporting grades: 7

Description: Sal chooses the correct interpretation of the integer expression 3 + (-7). Well before I even read this, let's just think about what's happening in one plus six on the number line. Now six to the left of one, in this type of a number line, which is the standard number line, where to the right is positive and to the left is negative. Let's keep going.

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