Students demonstrate their problem-solving ability as they work on this add multiples of 10 and 100 worksheet. When a number is added to 0, the result is the number itself. Students love adding numbers that end in zeros. With a set of problems on add multiples of 10 and 100, this worksheet improves their accuracy. 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.