Students love it when they get to multiply numbers that end in zeros. They understand that they can ignore that zero during calculation and only bring it back when writing the product. Multiply 100 and 3-digit numbers worksheet provides plenty of practice with this concept. 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.