Add and Subtract Two 3-Digit Numbers with Regrouping: Horizontal Addition and Subtraction Worksheet

Task your little mathematicians to crack the code of adding and subtracting two 3-digit numbers with regrouping with this fun worksheet. The opposite operation to addition is subtraction and vice versa. In this worksheet, students apply this relationship and their knowledge of basic addition and subtraction facts to add and subtract two 3-digit numbers with regrouping. This worksheet is about practicing with the horizontal format in which numbers are written side by side. To develop flexibility with numbers and operations, students need to have enough practice in this format and not just rely on the vertical/column method.