### We found 6,132 reviewed resources for Sums

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#### EngageNY Grade 6 Math Module 2: Arithmetic Operations Including Division of Fractions

Twenty-one lessons and two exams make up a math unit all about decimal operations and division of fractions. By way of direct instruction, discussion, guided practice, collaborative learning, and independent practice scholars solve...

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#### Study Jams! Estimate Sums & Differences of Whole Numbers

Estimating is an essential skill used in everyday life. This presentation explains how to apply prior knowledge about rounding numbers to estimating sums and differences. Example problems and assessment include large numbers, making this...

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#### Triangle Angle Sum

Don't believe everything that you hear — make them prove it! The video shows two methods to prove the Triangle Angle Sum Theorem. The following two videos apply the theorem to finding missing angle measures.

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#### Triangle Sum Theorem: Lesson

The measures all add up. The presentation, part of a helpful playlist on geometry, provides the statement of the Triangle Sum Theorem. Using the theorem, the video shows how to find the missing measure of an angle.

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#### What is the Triangle Sum Theorem?

If you add the value of the three interior angles in a triangle will it equal 180 degrees? Yes it will. The instructor illustrates and proves the Triangle Sum Theorem. Follow closely as she explains her proof.

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#### Triangle Sum Theorem

Your visual geometry learners will appreciate triangle drawings as they model the triangle sum theorem and algebraically solve to find the missing interior angle in a triangle. Practice problems increase in complexity and vary in their...

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#### InteGreat

Hands-on investigation of Riemann sums becomes possible without intensive arithmetic gymnastics with this interactive lesson plan. Learners manipulate online graphing tools to develop and test theories about right, left, and midpoint...

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#### The Sum of Angles in a Triangle

An informative lesson contains a brief explanation of how the sum of the angles of a triangle is a line. The lesson continues with determining the missing angle in a triangle, or solving for a variable. Using the sum of the angles, the...

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#### Sums and Difference of Cubes

Learners factor polynomials using the sum and difference of cubes. They also learn connections between the graph and expression.

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#### Series Sum Example

Sal solves a complex problem from the 2010 IIT entrance test on sum of an infinite geometric series.

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#### A Sum of Functions

Collaborative learners will see the geometric addition of functions by graphing the sum of two graphed curves on the same coordinate plane. This task then naturally flows into giving learners the algebraic representation of the curves...

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#### Sum of Angles in a Polygon

How can learners use algebra to solve a geometry problem? Help learners create an equation that shows the relationship between the number of sides of a polygon and the sum of the interior angles. Students are asked to divide the...

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#### Triangle Sum

Explore, investigate, and finally prove the angles in a triangle have a sum of 180 degrees. Young geometers use the Interior Angles Theorem, and properties and definitions of congruency.

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#### Estimating Sums and Differences

Work on rounding, estimating, adding, and subtracting with a helpful math worksheet! Fifth graders study different sets of addition and subtraction problems, and after rounding each number to the leading digit, they estimate what the sum...

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#### Polygon Angle Sum

Using patterns to build a formula is an important mathematical skill. Pupils discover a formula to find the sum of interior angles in a polygon by analyzing a pattern. The additional videos show how to use the formula to find various...

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#### Find the Sums (Under 100)

All of these sums are under 100: learners practice with three types of addition problems, each with two equations. First, they add a double-digit and single-digit number. Then, scholars add two double-digit numbers, one being a multiple...

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#### Factoring the Sum of Cubes

Examine the patterns of polynomial factoring with your classes. The video describes the specific process of factoring the sum of cubes. The instructor demonstrates two examples with both variables and coefficients.

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#### Riemann Sums

Mathematicians use their calculators to investigate Riemann sums. Your learners will explore the relationship between the limit of two Riemann sums and the definite integral of the function.

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#### Riemann Sums

Students calculate the area under a curve. In this calculus lesson, students use Riemann Sums to find the area under a curve. They apply the boundaries of intervals as they solve for each area.

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#### Triangle Sum Theorem

Teach your class how to solve problems using the triangle sum theorem. In this geometry instructional activity, students identify the missing angles in a triangle using the sum theorem. They graph triangles on the TI and moves the sides...

EngageNY

#### Angle Sum of a Triangle

Prove the Angle Sum Theorem of a triangle using parallel line and transversal angle relationships. Pupils create a triangle from parallel lines and transversals. They find angle measures to show that the angles of a triangle must total...

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#### Discovering Triangle Sum

Math is everywhere, even in bikes! Groups investigate the sum of the angles of a triangles with two method—measurements and transformations. Using diagrams of bicycles, classmates find the types of triangles formed by the seat and axles....

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#### Angle Sum Property of Triangles

All triangles have some things in common. Using these properties of triangles, learners find missing angle measures. Scholars use the Angle Sum Property and properties of special triangles throughout the lesson.

EngageNY

#### Sums and Differences of Decimals

Sometimes dealing with decimals is so much easier than dealing with fractions. The ninth lesson in a 21-part module has the class consider situations when it might be easier to add or subtract fractions by first converting to decimals....