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
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: Scratch Addition
Demonstrates a method for easily adding long vertical columns of numbers. Includes two sample problems to try.
CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Money With Pictures in Columns
[Free Registration/Login may be required to access all resource tools.] The resource begins with a video that describes and shows the process of adding money by lining them up in columns. The pictures included in the video and the...
NumberNut
Number Nut: Addition: Adding Three Digit Numbers
Explains how to add three-digit numbers by focusing on each column of digits as you add.
Beacon Learning Center
Beacon Learning Center: Show Me the Money
Students can practice lining up decimals while adding money amounts in this interactive web lesson.