Column Addition (3+ Addends) Color by Number rewards every correct answer with another piece of a hidden picture. Students solve each problem, match the answer to the color key, and a hidden picture appears region by region. Students add three or more numbers in a column, managing multiple regroupings. Built for Grades 2–4 and aligned to 2.NBT.B.6, 4.NBT.B.4. It's no-prep and self-checking, perfect for centers, fast finishers, review days, or sub plans, with both a print-ready PDF and an interactive answer-key version in every download.