Challenge your young math wizards to solve this subtract decimals less than 1 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. 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.