Help your little one develop a knack for math with this add and subtract hundredths less than 1 with regrouping worksheet. Students know the significance of aligning the decimal points and using zeros as placeholders while adding or subtracting decimals. They must regroup the numbers in this worksheet to get the answer. 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.