This worksheet challenges young mathematicians to hone their math skills by solving a set of problems on adding and subtracting tenths and hundredths less than 100 without regrouping. When adding or subtracting decimals, students understand the need to align the decimal points and use zeros as stop signs. They do not need to regroup numbers to find the answer on this worksheet. In this worksheet, numbers are laid one on top of another (vertical format). This encourages students to use the inherent place value structure to solve the problems.