Video

Combining like terms (Full video)

Khan Academy
Supporting grades: 6

Description: Sal explains why 4a + 2a = 6a several ways. Let's say that you started off with 3 apples. But let's say I want to do the same type of thinking, but I'm too lazy to write the word "apples." Let's say instead of writing the word "apples," I just use the letter a.

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