Add 5-Digit and 3-Digit Numbers with Regrouping: Horizontal Addition Worksheet

This worksheet invites students to add 5-digit and 3-digit numbers with regrouping, which helps them become proficient in addition. In this worksheet, students practice solving problems written in the horizontal format. How numbers are laid out in a problem affects the method a student employs to solve it. Therefore to develop actual fluency and mastery of multiple strategies, students must practice different formats.