Khan Academy
Khan Academy: Adding Two Digit Numbers (No Regrouping)
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.
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
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!
AAA Math
Aaa Math: Adding Numbers
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.
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 2 Digit Numbers by Making Tens 2
Practice adding two-digit numbers by making groups of ten.
Oswego City School District
Regents Exam Prep Center: Complex Numbers
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...
University of Saskatchewan (Canada)
University of Saskatchewan: Complex Numbers
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...
Khan Academy
Khan Academy: Regroup When Adding 1 Digit Numbers
Practice adding numbers like 45+8. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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!
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.
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.
Khan Academy
Khan Academy: Adding & Subtracting Rational Numbers
Practice adding and subtracting rational numbers of different forms.
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers (No Regrouping)
Practice adding and subtracting mixed numbers.
Khan Academy
Khan Academy: Adding & Subtracting Negative Numbers
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.
Better Lesson
Better Lesson: Adding and Subtracting Fractions
Understanding that when the total number of parts of a whole are the same, fractions can be added.
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.
Other
Nearpod: Adding & Subtracting: Unlike Denominators
In this lesson, 5th graders will learn how to add and subtract fractions and mixed numbers using models and by finding common denominators.
Other
Help With Fractions: Adding Fractions
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.
Math Planet
Math Planet: Algebra 1: Calculating With Real Numbers
Provides explanations and a video lesson that illustrates how to calculate with real numbers.
Khan Academy
Khan Academy: Adding Negative Numbers
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.
Khan Academy
Khan Academy: Add 2 Digit Numbers by Making Tens
Students will be challenged in their skills to add 2-digit numbers by making tens
Starfall
Starfall: Add <= 10 Machine
In this adding machine learning game, children add the contents of two boxes and select the correct answer. The totals are 10 and under.
Texas Instruments
Texas Instruments: Crunching Numbers
In this activity, students learn to build and add two digit numbers. They connect number words and numerals.
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