Singapore Math: Grade 3a, Unit 2 (Part 2)

By working through word problems involving subtraction and using numbers in the hundreds, the instructor uses visual cues to help viewers understand how to solve the problem. The instructor's method for solving the problem involves graphics and brightly colored ways to differentiate values. Young mathematicians can learn to make predictions about the solution to a word problem using the methods Sal describes. This is a terrific way to break down word problems into manageable and understandable chunks.