Can your young mathematician add 5-digit and 3-digit numbers without regrouping? That's exactly what they do here. Students should be aware of the fundamental relationships between the digits in the numbers they add. They add digits at the same locations to find the sum while adding multi-digit numbers. Add 5-digit and 3-digit numbers without regrouping worksheet offers a tonne of practice with this concept. 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.