Multiply by 1-Digit Numbers. Ready to go, Daily Lessons, done for you! This PowerPoint contains 246 slides that walk your students through 11 lessons, teaching them how to multiply by 1-digit numbers. It can be used to supplement the curriculum you already have or it can be used as a stand alone unit! Lessons begin with multiplying by multiples of 10, 100 and 1.000 and then move on to the distributive property, partial products, arrays, the traditional algorithm and also problem solving. These l