Video

Using place value to add 3-digit numbers: part 2 (Full video)

Khan Academy

Description: Learn to use regrouping to add 536 + 398. Created by Sal Khan. So it really represents 5 hundreds or 500. Now let's start in the right-most column. 6 plus 8, we've already figured out, is equal to 14, which is the same thing as 10 plus 4.

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