Help your little one develop a knack for math with this subtract thousandths less than 100 without regrouping worksheet. In this worksheet, students subtract decimals by aligning the decimal points and using zero as a placeholder. They do not need to regroup to find the difference. As the worksheet uses a horizontal format, it allows for more creativity when it comes to how the student solves the problem. In contrast, in the vertical format, students usually employ the standard method to solve.