Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 100 With Regrouping
Demonstrates how to regroup when adding 2-digit numbers.
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers 2 (With Regrouping)
Practice adding and subtracting mixed numbers with common (like) denominators. Some items require regrouping. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers (With Regrouping)
Practice adding and subtracting mixed numbers with common (like) denominators. Items require regrouping (borrowing).
CK-12 Foundation
Ck 12: Elem Math: Adding Two Digit Numbers With Regrouping
[Free Registration/Login may be required to access all resource tools.] The video models how to add two-digit numbers using regrouping. The video is followed by practice problems.
AAA Math
Aaa Math: Adding Two Digit Numbers Mentally
Read these two strategies for adding two-digit numbers in your head. Then try out the one you like better by playing the game. Running totals of your correct and incorrect answers as well as a percent score of your correct answers will...
AAA Math
Aaa Math: Adding Seven Digit Numbers
This lesson is provided for by J. Banfill at AAAMath.com. Look over an example of adding seven digit numbers and then play this online game for practice. The game will keep track of your correct and incorrect answers, as well as give you...
AAA Math
Aaa Math: Adding Five Digit Numbers
AAAMath.com provides an online game to practice addition with five digit numbers. The game will give you addition problems and keep track of your correct and incorrect answers. It will also give you a percent score for the correct answers!
AAA Math
Aaa Math: Adding Six Digit Numbers
This lesson has a game and explanation of addition with six digit numbers. The game will keep running totals of your correct and incorrect answers. It will also give a percent score of the correct answers for you to see.
Khan Academy
Khan Academy: Add & Subtract Mixed Numbers With Unlike Denominators (Regrouping)
Practice adding and subtracting mixed numbers with different denominators. Regrouping required.
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
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers With Unlike Denominators 2
Practice adding and subtracting mixed numbers with different denominators. Regrouping required. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Beacon Learning Center
Beacon Learning Center: Circus Fun
Students can practice adding up to three whole numbers with regrouping in this interactive web lesson.
ClassFlow
Class Flow: Adding Larger Numbers
[Free Registration/Login Required] This is a flipchart to introduce adding two-digit numbers with regrouping. Applicable for grades 2 and 3.
Khan Academy
Khan Academy: Add/ Subtract Mixed Numbers W Unlike Denominators (No Regrouping)
Practice adding and subtracting mixed numbers with different denominators. No regrouping required.
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers With Unlike Denominators 1
Practice adding and subtracting mixed numbers with different denominators. No regrouping required. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers (No Regrouping)
Practice adding and subtracting mixed numbers with common (like) denominators.
NumberNut
Number Nut: Let Math Begin With Addition
This introductory addition lesson, explores the relationship between adding and number patterns using a number pyramid designed by mathematician Carl Gauss. A short lesson with interesting facts and links to related games for practicing...
University of Cambridge
University of Cambridge: Nrich: Adding Plus
On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.
AAA Math
Aaa Math: Adding Three Numbers
Find an explanation on how to add three numbers together using pencil and paper. There is also an online game that will keep running totals of your correct and incorrect answers. The lesson also gives you a percent score of the correct...
ClassFlow
Class Flow: This Doesn't Add Up!
[Free Registration/Login Required] This flipchart teaches the steps in adding 2 or more digits with regrouping and gives students practice problems.
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers (No Regrouping)
Practice adding and subtracting mixed numbers with common (like) denominators. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
NumberNut
Number Nut: More Than Two Addends
Develop strategies for adding more than two addends with this quick addition lesson. Examine how grouping numbers can help make adding multiple numbers easier. Then, practice your new skills using the related interactive games that are...
Teaching Treasures Publications
Teaching Treasures: Year Three Math (Page 1)
Sharpen your mathematical skills with this interactive worksheet that combines two-digit addition, two-digit subtraction, and basic multiplication facts. This activity is easy to grasp and gives learners immediate feedback to their...
Teaching Treasures Publications
Teaching Treasures: Year Four Timed Mental Math (Page 2)
Improve your computations skills in all four operations with this timed interactive worksheet. Solve ten problems in five minutes or less. Problems are presented in horizontal format and answers can be checked immediately. This worksheet...