Cool Math
Coolmath: Coolmath4kids: Subtracting Numbers Within 1000
Step-by-step tutorial showing how to subtract numbers less than 1000 in place value columns with and without regrouping. Includes sample problems to try.
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: 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: Adding Numbers Within 100
A step-by-step tutorial showing how to add 2-digit numbers in place value columns without regrouping. Includes exercises to try. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000
Cool Math
Coolmath: Coolmath4kids: Addition Quiz
A customizable addition quiz where you can choose what numbers to cover, from 10 to 30 questions, and how much time students can have to answer. The quiz can also be printed for use as a worksheet.
Cool Math
Coolmath: Coolmath4kids: Addition: Place Value Review
Reviews what place value is and how it is used in addition. Includes exercises to try.
Cool Math
Coolmath: Coolmath4kids: Add Fractions With Like Denominators
Demonstrates how to add fractions where the denominators are the same. Includes sample problems to try.
Cool Math
Coolmath: Coolmath4kids: Adding and Subtracting Fractions With Different Denominators
Demonstrates how to add and subtract fractions where the denominators are different. Includes sample problems to try.
Cool Math
Coolmath: Coolmath4kids: Adding and Subtracting Fractions With Whole and Mixed Numbers
Short tutorial explaining how to add and subtract fractions, whole numbers, and mixed numbers. Includes example problems to try.
Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 1000
Step-by-step tutorial showing how to add 3-digit numbers in place value columns with and without regrouping. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000