Other
Nearpod: Addition & Subtraction Strategies
In this lesson, students will relate counting to addition and subtraction and will learn several strategies for solving addition and subtraction problems.
Saddleback College
Algebra2go: Addition and Subtraction Problem Sets
This resource contains 3 problem sets. Each problem set contains six questions. Select a problem set, then select a question. Fill in the blank with the correct answer for each problem. When you have answered all of the questions, ask...
Mocomi & Anibrain Digital Technologies
Mocomi: Addition and Subtraction of Integers
Explores the commutative, associative, and distributive properties of integers, and rules for adding and subtracting them.
CK-12 Foundation
Ck 12: Trigonometry: Tangent Sum and Difference Formulas
[Free Registration/Login may be required to access all resource tools.] Here you'll learn to rewrite tangent functions with addition or subtraction in their arguments in a more easily solvable form.
CK-12 Foundation
Ck 12: Trigonometry: Applications of Sum and Difference Formulas
[Free Registration/Login may be required to access all resource tools.] Solving equations and verifying identities with the sum and difference formulas.
Better Lesson
Better Lesson: Solving Subtraction Number Stories Writing the Answer Lesson Plan
Students will be able to solve subtraction word problems using objects and write a numeral for the solution.
Better Lesson
Better Lesson: Smoothing Out Subtraction
Second graders demonstrate comfort with addition, but show less ease with subtraction. Repeated practice with subtraction is necessary to build fluency.
Saddleback College
Algebra2go: Introduction to Subtraction Problem Sets
This resource has three problem sets to practice subtraction. Select a problem set, then select a question. Fill in the blank with the correct answer for each problem. When you have answered all of the questions, ask Charlie how you did.
Education.com
Education.com: Jelly Bean Subtraction
[Free Registration/Login Required] This picture-perfect picnic is all set for some subtraction practice! Count up the jelly beans to find out how many got eaten. This picture problem is a great first step to helping your child understand...
Learning Wave Communications
Learning Wave: Commutative and Associative Properties of Addition
A detailed example is used to demonstrate the difference between the commutative and associative properties of addition.
Better Lesson
Better Lesson: Working With Larger Numbers
Explore subtraction and addition but having student collect data from rolling objects. This instructional activity has students adding and subtracting numbers they collected using strategies used in class. Use the document and video...
Khan Academy
Khan Academy: Challenging Add and Subtract Word Problems (Within 100)
Practice solving more challenging addition and subtraction word problems with "more" and "fewer". Multi-step problems are also included. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity to try...
NumberNut
Number Nut: Subtraction: Subtracting From Three Digit Numbers
Explains how to subtract from three-digit numbers, with or without regrouping.
NumberNut
Number Nut: Subtraction: Subtracting Through Twenty
Explains how to subtract numbers from twenty or less, with reference to using addition to find the difference.
NumberNut
Number Nut: Subtraction: 3 Digit Numbers
A brief lesson on subtracting from three-digit numbers that includes detailed examples, rules, and further explanation of borrowing.
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...
Illustrative Mathematics
Illustrative Mathematics: 1.oa \$20 Dot Map
In this lesson plan, 1st graders are given a graphic of a map and are to use addition and subtraction to solve the word problem.
Illustrative Mathematics
Illustrative Mathematics: 1.oa Sharing Markers
In this lesson plan students are to answer word problems using addition or subtraction within 20.
Illustrative Mathematics
Illustrative Mathematics: 1.oa the Pet Snake
This complete lesson plan has students solve word problems using addition and subtraction within 20.
ABCya
Abc Ya: Math Fact Shoot Out
Use multiplication, division, addition, or subtraction to play this math basketball game. Choose your operation and level to try to collect basketballs to use for shooting free throws. Each correct answer earns you one basketball - the...
Illustrative Mathematics
Illustrative Mathematics: 1.oa Maria's Marbles
This lesson plans has students solve word problems about marbles using addition or subtraction within 20.
Cool Math
Coolmath: Order of Operations More on Mdas
Students will learn from these notes that will challenge their application of the order of operations. Multiplication, division, addition, and subtraction are featured in these notes.
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....
Other
Houghton Mifflin: Mayan Mathematics
This site explains the mathematical system of the Mayans. It gives the represenation they used for numbers and how they did addition and subtraction.
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