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Interactive
CK-12 Foundation

Sums of Integers with Different Signs: Adding Between 10 and -10

For Students 6th - 8th Standards
Six questions make up an interactive designed to boost scholars' knowledge of integers. Mathematicians move symbols over a horizontal number line to aid in findings answers between 10 and negative 10. Question types include...
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Interactive
CK-12 Foundation

Sums of Fractions with Like Denominators: Cheesy Bread

For Students 6th - 8th Standards
Five questions make up an interactive all about adding fractions with like denominators. Mathematicians answer multiple-choice problems and an open-ended question using a fraction model that resembles sliced bread. The practice ends with...
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Worksheet
Scholastic

Sums & Differences

For Students 3rd - 6th Standards
Word problem solving and inter-galaxy football combine to offer a great worksheet for practicing adding and subtracting whole numbers! 
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Printables
Chapman University

A Pythagorean-Style Proof of the Sine Sum-of-Angles Formula

For Teachers 10th - 12th
This well organized poster shows a step-by-step algebraic proof and related graphic. Understanding how formulas were derived, connects learners to the idea that the study of mathematics is continuous and cumulative. Learners will also...
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Interactive
CK-12 Foundation

Sums of Integers with Different Signs: Board Game

For Students 5th - 7th Standards
Five questions challenge scholars to show what they know about integers. Using an interactive board game, learners move pieces to discover where a player landed, then answer problems involving both positive and negative integers. 
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Interactive
CK-12 Foundation

Sums and Differences of Independent Random Variables: Traveling Seasickness

For Students 9th - 12th Standards
Use a Punnett square to calculate probabilities. The resource presents a situation in which two patients are randomly selected from a group of patients with a particular illness. Pupils use the interactive to determine the likelihood...
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Interactive
CK-12 Foundation

Simplify Sums or Differences of Single Variable Expressions: Addition and Subtraction of Like Terms

For Students 7th - 9th Standards
Investigate the process of combining like terms using an interactive animation. Scholars tackle simplifying expressions by manipulating rectangles that represent the terms. They add and subtract terms to arrive at the result.
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Interactive
CK-12 Foundation

Sums and Differences of Single Variable Expressions: Algebraic Soup

For Students 7th - 9th
Alphabet soup just got an upgrade. Pupils drag expressions from algebraic soup to indicate whether it is a like term to x or to y. Some challenge questions require combining the like terms to simplify expressions.
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Worksheet
Curated OER

Use the Clues

For Students 2nd
In this reasoning worksheet, 2nd graders, after looking over the example, read 3 clues 3 times to find the 3 numbers that make each sum in 3 boxes.
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Lesson Plan
Curated OER

Easter Addition

For Teachers 2nd - 4th
In this Easter addition worksheet, students problem solve and calculate the answers to twenty-five addition equations and color all of the Easter eggs that have an even numbered sum.
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Lesson Plan
Curated OER

Easter Addition

For Teachers 2nd - 4th
In this Easter addition worksheet, students problem solve and calculate the answers to twenty-five addition equations and color all of the Easter eggs that have an even numbered sum.
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Lesson Plan
Curated OER

Easter Addition

For Teachers 2nd - 4th
In this Easter addition worksheet, students problem solve and calculate the answers to twenty-five addition equations and color all of the Easter eggs that have an even numbered sum.
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Lesson Plan
Curated OER

Easter Addition

For Teachers 2nd - 4th
In this Easter addition worksheet, young scholars problem solve and calculate the answers to twenty-five addition equations and color all of the Easter eggs that have an even numbered sum.
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Worksheet
Curated OER

Magic Squares

For Students 4th - 8th
In this magic squares worksheet, students complete each magic square where each row, column, and diagonal have to be the same sum. Students complete 6 magic squares.
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Worksheet
Curated OER

Section 12-5: Addition and Subtraction of Radicals

For Students 9th - 11th
In this radical worksheet, students find the sum and difference of given radicals.  They simplify radical expressions.  This two-page worksheet contains 10 multiple-choice problems.  Answers are provided on the last page.
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Lesson Plan
Curated OER

Measuring Angles in a Triangle

For Teachers 9th - 12th Standards
High schoolers investigate the sum of the measures of the angles of a triangle. They draw a triangle and measure the interior angles. Using Cabri Jr., learners find the sum of the measures of the interior angles. The instructional...
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Worksheet
Curated OER

Nature of Roots

For Students 9th - 11th
In this nature of roots worksheet, learners solve 10 different problems that include determining the sum and product in each one. First, they determining the sum of the roots in the given equation. Then, students determine the product of...
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Worksheet
Curated OER

Magic Squares

For Students 2nd - 4th
In this magic squares worksheet, students add up the sum of the rows, columns, and diagonals to see if they are all the same and write the magic number. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
In this magic squares worksheet, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic squares

For Students 3rd - 4th
In this magic squares worksheet, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
In this magic squares activity, learners add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
For this magic squares worksheet, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
In this magic squares worksheet, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Lesson Plan
Curated OER

Lesson #110 Volumes of Solids of Revolution (Disk Method)

For Teachers 7th - 12th
Students examine volumes of solids of revolution. In this volumes of solids of revolution activity, students use the limit of a Riemann sum to find the volumes of disks or cylinders and a sphere.

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