Video

Subtracting 3-digit numbers (regrouping) (Full video)

Khan Academy
Supporting grades: 3

Description: Sal uses regrouping (borrowing) and place value to subtract 629 - 172. Created by Sal Khan. So let's just start subtracting, and we'll start with the ones place. And over here we could also say, well, 9 minus 2, we have the subtraction out front. But then something interesting happens when we get to the tens place.

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