Subtract hundredths and thousandths without regrouping worksheet is a great way to help learners become fluent with the concept of subtraction. Students align the decimal points and use zeros as space holders as they subtract decimals in this worksheet. However, regrouping of numbers is not required here. 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.