Help your little one develop a knack for math with this add decimals less than 1 worksheet. When adding decimals, students line up the decimal points and add extra zeros to the right of the number so that each decimal has the same number of digits. Students then add digits at each place to find the sum. This worksheet is about practicing the column method in which numbers are written one on top of another. In this method, students use their place value understanding to solve the problems.