Give your little one some practice building addition skills with this add thousandths less than 10 with regrouping worksheet. Students align the decimal points and use zeros as space holders as they add decimals in this worksheet. Additionally, they also need to regroup numbers to find the sum. 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.