Task your little mathematicians to crack the code of adding and subtracting tenths and hundredths less than 1 without regrouping with this fun worksheet. Students know the significance of aligning the decimal points and using zeros as placeholders while adding or subtracting decimals. They do not need to regroup to get the answer. 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.