Three More within 20: Horizontal Addition Worksheet

Students are aware that more than means to add. So they use the count on strategy to get to the result. Three more within 20 worksheet provides students with a tonne of experience 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.