Cool Math
Coolmath: Coolmath4kids: Division: An Introduction
Uses visual models to explain what division is and includes sample problems to try. It also offers links to division games.
Cool Math
Coolmath: Coolmath4kids: Subtracting Numbers Within 100 With Regrouping
A step-by-step tutorial showing how to subtract using two-digit numbers in the tens and ones columns with regrouping. Includes sample problems to try. It also provides links to subtraction games and more.
Cool Math
Coolmath: Coolmath4kids: How Subtraction Works
Uses visual models to explain what subtraction is and includes suggested activities for parents to try at home. It also provides links to subtraction games and more.