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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Addition: 3 Digits

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] A video and practice questions on adding 3-digit numbers with regrouping. [1:32]
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Activity
NumberNut

Number Nut: Addition: Carrying

For Students 3rd - 5th
Explains how to carry when regrouping in addition, with related activities for skill practice.
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Unit Plan
Khan Academy

Khan Academy: Subtracting Two Digit Numbers (No Regrouping)

For Students Pre-K - 1st Standards
In this exercise, students practice subtracting two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions repeatedly.
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Unknown Type
Khan Academy

Khan Academy: Add & Subtract Mixed Numbers With Unlike Denominators (Regrouping)

For Students 5th
Practice adding and subtracting mixed numbers with different denominators. Regrouping required.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Overview of Addition Sums to 100 Word Problems

For Students 2nd - 4th Standards
[Free Registration/Login may be required to access all resource tools.] The video explains two addition problems one with regrouping and the other without regrouping.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding Two Digit Numbers With Regrouping

For Students 2nd - 4th
[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.
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Interactive
Doina Popovici

Math Play: Addition With Regrouping Math Racing Game

For Students 2nd - 4th
Race to a win with this math game where students have to do addition with regrouping.
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Unknown Type
Khan Academy

Khan Academy: Add/ Subtract Mixed Numbers W Unlike Denominators (No Regrouping)

For Students 5th
Practice adding and subtracting mixed numbers with different denominators. No regrouping required.
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Unknown Type
Khan Academy

Khan Academy: Add and Subtract Mixed Numbers (No Regrouping)

For Students 3rd - 5th Standards
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.
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Activity
NumberNut

Number Nut: Addition: 3 Digit Numbers

For Students 3rd - 8th
Three digit addition requires working from left to right and may require carrying. Follow the steps in the examples and then practice the skills with the two interactive activities.
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Whiteboard
SMART Technologies

Smart: Regrouping in Addition and Subtraction

For Teachers 2nd - 3rd Standards
An interactive lesson to help 2nd graders understand fair exchanges and how they apply to regrouping in addition and subtraction.
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Whiteboard
ClassFlow

Class Flow: To Regroup or Not to Regroup, That Is the Question

For Teachers Pre-K - 1st Standards
[Free Registration/Login Required] Given base ten blocks and 5 addition problems, the students will demonstrate understanding of the base ten system by choosing to regroup when needed 100 % of the time, with or without visual...
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Interactive
AAA Math

Aaa Math: Vertical Addition

For Students 1st - 5th
See examples of addition problems that are arranged vertically. There is also a game that allows you to practice your addition skills. The game keeps track of your correct and incorrect answers, it also gives a percentage score of your...
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Interactive
AAA Math

Aaa Math: Adding Three Digit Numbers

For Students 2nd - 5th Standards
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...
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Activity
Quia

Quia: Adding to 10

For Students 3rd - 5th Standards
This website for young children gives them practice adding sums to 10. Problems are presented as teddy bears to add up with the corresponding digits that represent the problem symbolically.
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Activity
Lizard Point Quizzes

Lizard Point: Addition Practice

For Students Pre-K - 1st Standards
Practice several different levels of difficulty of addition problems from single digit all the way up to 3 digit with regrouping. You can also choose single digit addition with negative numbers. When you are finished you can print your...
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Unknown Type
NumberNut

Number Nut: Subtraction: Three Digit Subtraction With Borrowing

For Students 3rd - 5th
A quiz for practicing subtraction with three-digit numbers where there is regrouping.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Overview of Addition Sums to 100 Word Problems

For Students 1st - 2nd Standards
[Free Registration/Login may be required to access all resource tools.] The video explains two addition problems one with regrouping and the other without regrouping.
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Activity
School Express

School Express: Online Addition

For Students Pre-K - 1st Standards
Great place to sharpen your addition skills. Start with basic facts and go all the way up to 3 digit addition with regrouping. You select the level of difficulty and the number of problems. You can also check your answer right away.
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Unit Plan
Cool Math

Coolmath: Coolmath4kids: Adding Numbers Within 1000

For Students 3rd - 4th Standards
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
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Three Math (Page 1)

For Students Pre-K - 1st Standards
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...
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Unknown Type
NumberNut

Number Nut: Subtraction: Three Digit Subtraction With No Borrowing

For Students 3rd - 5th
A quiz for practicing subtraction with three-digit numbers where there is no regrouping.
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Interactive
NumberNut

Number Nut: Subtraction: Subtracting From Three Digit Numbers

For Students K - 1st
Explains how to subtract from three-digit numbers, with or without regrouping.
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Unit Plan
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: Add Whole Numbers, Add Decimals

For Students 3rd - 8th Standards
This website explains and defines adding whole numbers and decimals. Content explores addition with regrouping and how to align numbers in a written calculation. There are even practice problems at the end of the lesson.

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