World Public Library

Subtraction with borrowing (regrouping) : Subtraction 3: Introduction to Borrowing or Regrouping

Sal Khan

Abstract

Adding and subtracting positive and negative whole numbers. Starts with 1+1=2 and covers carrying, borrowing, and word problems. You can subtract 21 from 45, but are a bit perplexed trying to subtract 26 from 45 (how do you subtract the 6 in 26 from the 5

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