Add and Subtract 3-Digit Numbers and Multiples of 100: Horizontal Addition and Subtraction Worksheet

This add and subtract 3-digit numbers and multiples of 100 worksheet consists of tasks to help your young mathematician develop fluency with addition and subtraction. 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.