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Khan Academy
Khan Academy: Worked Example: Subtracting 3 Digit Numbers (Regrouping Twice)
Demonstrates how to subtract 3-digit numbers when there is regrouping in the ones and the tens places. The example used is 913 - 286. [3:47]
Khan Academy
Khan Academy: Worked Example: Subtracting 3 Digit Numbers (Regrouping Twice)
Sal using regrouping (borrowing) to subtract 913-286.