Stage 2 · The Four Operations & Estimation
2.1.5 Multi-Digit Subtraction and Borrowing
2.1 Addition & Subtraction: Putting Together and Taking Away
Point 5 of 6
2.1.5 Multi-Digit Subtraction and Borrowing
Core ideaWhen a place doesn't have enough to subtract, borrow a ten from the neighbor on the left to pay the debt — that's borrowing.
Module goal. Move from counting to operating, building the real-world meaning of addition and subtraction, their inverse relationship, and column arithmetic for multi-digit numbers.