Unknown Type
Khan Academy

Khan Academy: Adding Two Digit Numbers (No Regrouping)

For Students Pre-K - 1st Standards
In this exercise, students practice adding two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Handout
Cool Math

Coolmath: Coolmath4kids: Adding Numbers Within 100

For Students 2nd - 3rd Standards
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
Unknown Type
Khan Academy

Khan Academy: Add 2 Digit Numbers by Making Tens 2

For Students 2nd - 4th Standards
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!
Activity
AAA Math

Aaa Math: Adding Numbers

For Students K - 1st Standards
At this lesson, practice adding single digit numbers with this online game. The game keeps a running total of your correct and incorrect answers, and a percent score of the answers you have correct.
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
Unknown Type
Khan Academy

Khan Academy: Add 2 Digit Numbers by Making Tens 2

For Students 2nd Standards
Practice adding two-digit numbers by making groups of ten.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Complex Numbers

For Teachers 9th - 10th Standards
A wealth of material to help you plan classroom instruction on complex numbers: several lessons that cover the number i, square roots of negative numbers, and operations involving complex numbers; practice activities, some of which...
Activity
University of Saskatchewan (Canada)

University of Saskatchewan: Complex Numbers

For Students 9th - 10th Standards
The University of Saskatchewan's Department of Mathematics and Statistics provides high school students with an online tutorial on complex numbers. Students can access accompanying examples within the tutorial. After you can also test...
Unit Plan
Khan Academy

Khan Academy: Regroup When Adding 1 Digit Numbers

For Students K - 1st
Practice adding numbers like 45+8. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Interactive
AAA Math

Aaa Math: Adding Five Digit Numbers

For Students 3rd - 5th
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!
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.
Unit Plan
Khan Academy

Khan Academy: Add and Subtract Mixed Numbers With Unlike Denominators 2

For Students 4th - 6th Standards
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.
Unknown Type
Khan Academy

Khan Academy: Adding & Subtracting Rational Numbers

For Students 7th Standards
Practice adding and subtracting rational numbers of different forms.
Unknown Type
Khan Academy

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

For Students 4th Standards
Practice adding and subtracting mixed numbers.
Unit Plan
Khan Academy

Khan Academy: Adding & Subtracting Negative Numbers

For Students 6th - 8th Standards
Practice solving addition and subtraction problems with integers (positive and negative numbers). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Lesson Plan
Better Lesson

Better Lesson: Adding and Subtracting Fractions

For Teachers 4th Standards
Understanding that when the total number of parts of a whole are the same, fractions can be added.
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.
Lesson Plan
Other

Nearpod: Adding & Subtracting: Unlike Denominators

For Teachers 5th Standards
In this lesson, 5th graders will learn how to add and subtract fractions and mixed numbers using models and by finding common denominators.
Unit Plan
Other

Help With Fractions: Adding Fractions

For Students 3rd - 8th Standards
The rules for adding fractions with the same or different denominators are clearly explained at this website. This is an excellent place to get step by step explanations for working with fractions.
eBook
Math Planet

Math Planet: Algebra 1: Calculating With Real Numbers

For Students 9th - 10th Standards
Provides explanations and a video lesson that illustrates how to calculate with real numbers.
Unit Plan
Khan Academy

Khan Academy: Adding Negative Numbers

For Students 6th - 8th
Practice adding positive and negative single-digit numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unknown Type
Khan Academy

Khan Academy: Add 2 Digit Numbers by Making Tens

For Students 2nd Standards
Students will be challenged in their skills to add 2-digit numbers by making tens
Interactive
Starfall

Starfall: Add <= 10 Machine

For Students Pre-K - 1st Standards
In this adding machine learning game, children add the contents of two boxes and select the correct answer. The totals are 10 and under.
Activity
Texas Instruments

Texas Instruments: Crunching Numbers

For Teachers Pre-K - 1st Standards
In this activity, students learn to build and add two digit numbers. They connect number words and numerals.

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