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CK-12 Foundation
Ck 12: Mental Math for Addition and Subtraction Equations
[Free Registration/Login Required] Students will use a real world example to solve single variable equations mentally. Click challenge me to answer a practice question and click learn more to watch a video.
Illustrative Mathematics
Illustrative Mathematics: 2.nbt One, Ten, and One Hundred More and Less
In this lesson plan students will understand place value using addition and subtraction.
Illustrative Mathematics
Illustrative Mathematics: Boys and Girls, Variation 1
This word problem focuses on the Put Together/Take Apart contexts for addition and subtraction. Young scholars may use objects, pictures, or equations to represent their solutions. Examples and explanations are provided.
Illustrative Mathematics
Illustrative Mathematics: 2.nbt Many Ways to Do Addition 2
This lesson plan has students exploring was to add and subtract numbers with multi-digits and place value.
Khan Academy
Khan Academy: Add and Subtract Polynomials
Exercises for practicing adding and subtracting polynomials. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Primary Resources
Primary Resources: Word and Real Life Problems
Are you looking for some problem solving activities to do with your class? Look no farther. This site includes games, worksheets, presentations in PowerPoint, and smartboard files.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Add and Subtract Ten on a Number Line [Pdf]
Students will roll a die and follow the directions to explore adding and subtracting on a number line.
Illustrative Mathematics
Illustrative Mathematics: Boys and Girls, Variation 2
Students are asked to solve a word problem with both addends unknown. They will write an equation and draw a picture to use to explain their answer.
E-learning for Kids
E Learning for Kids: Math: Snorkeling Great Barrier Reef: Number: Count to 20 and Comparison
Go snorkeling with Bill in the Great Barrier Reef and help him with some numbers in the sea!
Khan Academy
Khan Academy: Add and Subtract Polynomials: Two Variables
Practice adding and subtracting polynomials. 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: Add, Subtract, and Multiply With Parentheses Missing Number
[Free Registration/Login may be required to access all resource tools.] This is a video and practice problems demonstrate finding missing numbers using order of operations and working backwards. Operations include addition, subtraction,...
Texas Education Agency
Texas Gateway: 3.3 Vector Addition and Subtraction: Analytical Methods
By the end of this section, you will be able to understand the rules of vector addition and subtraction using analytical methods, apply analytical methods to determine vertical and horizontal component vectors, and apply analytical...
Khan Academy
Khan Academy: Addition & Subtraction: Find the Missing Value
Practice finding the missing value in an addition or subtraction equation involving negative numbers.
Khan Academy
Khan Academy: Addition and Subtraction Word Problems 2
In this exercise, students practice addition and subtraction word problems 2. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
CK-12 Foundation
Ck 12: Algebra: Addition and Subtraction of Radicals
Learn how to simplify expressions involving the addition and subtraction of radicals.
CK-12 Foundation
Ck 12: Elem Math: Two Step Metric Capacity With Addition and Subtraction
[Free Registration/Login may be required to access all resource tools.] In this learning module, students must solve two-step word problems about metric capacity using addition and subtraction. The process is demonstrated in the...
CK-12 Foundation
Ck 12: Elem Math: Mixed Operations Addition and Subtraction (Metric Capacities)
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to solve word problems involving the addition and subtraction of metric units of capacity. Includes video demonstrating...
Scholastic
Scholastic: Study Jams! Math: Addition and Subtraction: Estimate Sum, Difference
Complete this step by step lesson to estimate the sum and difference then test yourself.
CK-12 Foundation
Ck 12: Elem Math: Only Using Addition or Subtraction Symbols
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are presented with an equation where the operation signs are missing. They must find the correct order of addition and subtraction...
Khan Academy
Khan Academy: Addition and Subtraction Word Problems 2
Practice solving more challenging word problems with addition and subtraction. Numbers used are 20 or less.
CK-12 Foundation
Ck 12: Algebra: Addition and Subtraction of Rational Expressions
Learn how to add and subtract rational expressions.
Khan Academy
Khan Academy: Matrix Equations: Addition and Subtraction
Solve equations where the unknown is a matrix, by using matrix addition and subtraction. Students receive immediate feedback and have the opportunity to try questions repeatedly or receive hints.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Add and Subtract With Negatives
Find a quick, concise explanation of how to add and subtract with negatives. Step by step examples are included to help you understand how to find the sum or difference when negative numbers are involved.
CK-12 Foundation
Ck 12: Trigonometry: Sine Sum and Difference Formulas
[Free Registration/Login may be required to access all resource tools.] Sine of a sum or difference related to a set of cosine and sine functions. Here you'll learn to rewrite sine functions with addition or subtraction in their...
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