Multi-digit add/subtract3-digit
Add or subtract. Work down the columns, and check the sign first.
Once single-digit facts are automatic, children line numbers up and work column by column. These free printable worksheets practice the standard written method for adding and subtracting multi-digit whole numbers, carrying and borrowing across places.
Kid stuck on one? You don’t just get the sheet.

The answer key prints on a separate page.
Each problem stacks two numbers of the chosen digit length with the operation on the left, ready to be worked one column at a time from the ones place. Addition and subtraction share a page — or sticks to one — and every subtraction's top number is larger than the bottom, so answers stay whole and non-negative while the child concentrates on regrouping.
Regrouping is the whole point at this stage, so it is a control rather than an accident. Ask for problems that always carry or borrow when that is the sticking point, turn regrouping off for a gentler warm-up, or leave it mixed. The digit size sets the difficulty — two, three, or four digits — while the layout stays the familiar vertical column a child writes in by hand.
One question from this sheet, worked through a step at a time.
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