CK-12 Foundation
Ck 12: Elem Math: Adding Two Digit Numbers Without Regrouping
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a 2-digit addition problem without regrouping. The video is followed by practice problems.
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.
CK-12 Foundation
Ck 12: Elem Math: Adding Two Digit Numbers Without Regrouping
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a 2-digit addition problem without regrouping. The video is followed by practice problems.
Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 100 With Regrouping
Demonstrates how to regroup when adding 2-digit numbers.
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...
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.
CK-12 Foundation
Ck 12: Elem Math: Overview of Subtraction Numbers to 100
[Free Registration/Login may be required to access all resource tools.] The video explains two, two-digit subtraction problems one with regrouping and the other without regrouping.
CK-12 Foundation
Ck 12: Elem Math: Subtraction 3 Digits Minus 3 Digits
[Free Registration/Login may be required to access all resource tools.] The video shows how to subtract 3-digit numbers without regrouping. The video is followed by additional problems for students to practice the skills discussed in the...
AAA Math
Aaa Math: Adding Two Digit Numbers
This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and...
Khan Academy
Khan Academy: Add 2 Digit Numbers (No Regrouping)
Practice solving problems like 24 + 45. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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...
Khan Academy
Khan Academy: Subtract 2 Digit Numbers (No Regrouping)
Practice solving problems like 45 - 24. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Other
Nearpod: Adding Within 100
In this instructional activity on addition within 100, students will learn how to compose numbers and will explore strategies to add double-digit numbers such as vertical addition, regrouping, using multiples of 10, and labeling an open...
Teaching Treasures Publications
Teaching Treasures: Year Four Math (Page 2)
This interactive worksheet combines all four operations. The focus is on three-digit addition and subtraction and basic multiplication and division facts. This easy to navigate activity offers learners immediate feedback and would be...
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: Multiply With Regrouping
This interactive resource from Khan Academy provides multiplication practice. Students will multiply 3- or 4-digit numbers by 1-digit numbers. Regrouping (carrying) is needed. Students receive immediate feedback and have the opportunity...
Teaching Treasures Publications
Teaching Treasures: Year Three Math (Page 5)
Sharpen your computation skills with two-digit addition, two-digit subtraction, and one-digit multiplication facts using this interactive worksheet. Learners must be familiar with multiplication facts through twelve to be successful....
Khan Academy
Khan Academy: Add 2 and 3 Digit Numbers (No Regrouping)
Practice solving problems like 243 + 452. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Add 10s and 100s (No Regrouping)
Practice solving problems like 344+20 and 344+200. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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: Subtracting Numbers Within 100
Short tutorial showing how to subtract using two-digit numbers in tens and ones columns without regrouping.
AAA Math
Aaa Math: Adding Three Digit Numbers
Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct...
NumberNut
Number Nut: Subtracting More Than Two Values
Get the facts on how to subtract more than two values in this short subtraction lesson. This lesson offers step-by-step examples, suggested strategies and shortcuts, and links to related interactive games. Both games are fast-paced and...
Khan Academy
Khan Academy: Regrouping When Adding One Digit Numbers
In this exercise, students practice regrouping when adding one-digit numbers. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.