Students will learn the ins and outs of adding and subtracting numbers. Along the way, they'll be introduced to estimating and problem-solving. With plenty of on-screen graphics and examples, learning will be as easy as pie. Topics include: Addition, Subtraction, Estimating, and Problem-Solving Skills.

Originally released by Cerebellum Corporation, 2009. Streaming video file encoded with permission for digital streaming by Infobase on July 10, 2018.

Addition (4:07); --Subtraction (4:37); -- Estimating and Problem Solving (5:00); -- Tools and Models (8:25); -- Credits: Addition and Subtraction (0:08);.