Khan Academy
Khan Academy: Add 2 Digit Numbers by Making Tens 2
Practice adding two-digit numbers by making tens on Khan Academy. If you are stuck, watch a refresher video or choose to get a hint. Test yourself to see how many you can get correct!
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.
ClassFlow
Class Flow: Making a Ten Adding Two Digit Numbers
[Free Registration/Login Required] This flipchart introduces the concept of addition of sums of 10 or more than 10. The flipchart has examples with visuals to help students understand tens and ones. It would be useful when beginning a...
CK-12 Foundation
Ck 12: Elem Math: Adding Multiple One Digit Numbers With Pictures
[Free Registration/Login may be required to access all resource tools.] The video shows how to find the sum of 3, 1-digit numbers. A picture to model the problem is displayed in the video. Following the video is additional practice...
Sophia Learning
Sophia: Adding With Significant Figures
A brief presentation helping the learner understand how many significant figures to use when adding numbers.
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 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...
Khan Academy
Khan Academy: Multi Digit Addition
Add whole numbers with sums less than 1,000,000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Mr. Martini's Classroom
Mr. Martini's Classroom: Big Number Flashcards: Addition Through 99
These interactive flashcards help students add two-digit numbers through 99. The problem changes color with the correct answer.
CK-12 Foundation
Ck 12: Elem Math: Adding 3 Numbers Word Problems
[Free Registration/Login may be required to access all resource tools.] This mathematics resource begins with a video tutorial working through a word problem adding 3 whole numbers. It also includes adaptive practice questions for adding...
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
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.
Teaching Treasures Publications
Teaching Treasures: Year Four Math (Page 1)
This interactive worksheet combines all four operations. The focus is on addition and subtraction fact through one hundred and basic multiplication and division facts. This easy to navigate activity offers learners immediate feedback and...