This worksheet challenges young mathematicians to hone their math skills by solving a set of problems on adding tenths less than 10 with regrouping. In this worksheet, students add decimals by aligning the decimal points and using zero as a placeholder. To find the sum, they must additionally regroup the numbers. This worksheet is about practicing the column method in which numbers are written one on top of another. In this method, students use their place value understanding to solve the problems.