How many are left? How many are missing? How many more are there? Subtraction is the key to finding out! In Subtraction, the concept of separating groups that make up a whole is illustrated using concrete objects from cookies to crayons. Kids learn that subtraction equations include minus signs and differences, and that they can be written horizontally or vertically.

Teacher's guide available under Additional info tag. DVD version only has optional spanish language track; Chaptered.