Better Lesson
Better Lesson: Adding and Subtracting Fractions Day 2
How would you add 2 1/2 and 2/3? How would you find the difference between 2 1/2 and 2/3? Students continue to develop strategies for adding and subtracting fractions.
Better Lesson
Better Lesson: Adding and Subtracting Fractions Day 1
If Ashley ate 1/2 pizza, Tatyana ate 1/3 of a pizza, and Tiffany ate 5/8 of a pizza, how much pizza did they eat altogether? What's the smallest number of pizzas they ordered? How much was left? Students work to develop strategies for...
Khan Academy
Khan Academy: Adding and Subtracting on the Number Line Word Problems
In this exercise, students practice adding and subtracting on the number line in word problems. Students receive immediate feedback and have the opportunity to watch a video tutorial, get hints, and try questions repeatedly.
Khan Academy
Khan Academy: Adding & Subtracting Rational Numbers
Practice adding and subtracting negative fractions, decimals, and percents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Lengths in Two Steps
[Free Registration/Login may be required to access all resource tools.] The video describes how to add and subtract measurements of length from a given word problem. The video is followed by practice problems covering the topics in the...
Math Planet
Math Planet: Pre Algebra: Adding and Subtracting Integers
Gain an understanding of how to add and subtract integers by viewing examples and a video lesson. [0:56]
Shodor Education Foundation
Shodor Interactivate: Fraction Adding and Subtracting
Use this discussion, provided by Shodor, to reinforce your knowledge on adding and subtracting fractions with unlike denominators.
Khan Academy
Khan Academy: Add and Subtract on a Number Line
Practice adding and subtracting numbers like 554 and 237 using a number line. All numbers are less than 1000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Add and Subtract Mixed Numbers 2 (With Regrouping)
Practice adding and subtracting mixed numbers with common (like) denominators. Some items require regrouping. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Add & Subtract Polynomials: Two Variables (Intro)
Example: Subtract or add polynomials. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Purple Math
Purplemath: Adding and Subtracting Matrices
Demonstrates how to add and subtract matrices, explains why the addition or subtraction sometimes can't be done, and gives an example of how matrix addition is used in homework problems.
Shmoop University
Shmoop: Adding and Subtracting Limits Examples
Examples of addition and subtraction with limits including solutions to the example problems.
Better Lesson
Better Lesson: Looking for Patterns + Show What You Know
How would you solve 3 1/4 - 1 5/6? What do students understand? What gaps do they have in their understanding? Students continue looking for patterns when they are adding and subtracting fractions and then they take a quiz.
Khan Academy
Khan Academy: Add and Subtract Within 100 Word Problems 2
Practice solving word problems with addition and subtraction. These questions are comparison problems including difference unknown, smaller value unknown, and bigger value unknown. Numbers used are 100 or less. Students receive immediate...
Khan Academy
Khan Academy: Estimate to Add and Subtract Multi Digit Whole Numbers
Use estimation to find a reasonable solution to multi-digit addition and subtraction problems. Numbers are less than or equal to 1000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Khan Academy
Khan Academy: Addition Using Groups of 10 and 100
In this exercise, students practice addition using groups of 10 and 100. Students receive immediate feedback and have the opportunity to get hints, watch a video tutorial, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2...
Fun Brain
Fun Brain: Line Jumper (Number Line Game)
Practice adding and subtracting positive and negative numbers by using a number line. Five levels of difficulty--easy, medium, hard, really hard, and super brain--to test your skills.
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