# Numbers and Operations Teacher Resources

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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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#### EngageNY Precalculus and Advanced Topics Module 1: Complex Numbers and Transformations

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#### Common Core Algebra 2, Unit 6: Complex Numbers

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#### EngageNY Grade 7 Math Module 2: Rational Numbers

Middle schoolers play the Integer Game to build a mental picture and conceptual understanding of integer operations. Tweens add, subtract, multiply, and divide signed numbersâ€”a practice beneficial inÂ developing their competency of...

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#### EngageNY Precalculus and Advanced Topics Curriculum

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#### EngageNY Algebra II Module 1: Polynomial, Rational, and Radical Relationships

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#### EngageNY Algebra II Module 1: Polynomial, Rational, and Radical Relationships

The 42 lessons in the Algebra II Module 1 collection are divided into four topics: Polynomials--From Base Ten to Base X, Factoring-- Its Use and Its Obstacles, Solving and Applying Equationsâ€”Polynomial, Rational and Radical, and A...

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#### Essence of Linear Algebra

The 15 videos in the Essence of Linear Algebra collection teach students how to understand the numerical operations of matrices as well as the geometric intuitions underlying them. The first video in the series details the rationale...

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#### Common Core Algebra 2, Unit 3: Rational Expressions

The five videos in the flipped classroom Common Core Algebra 2, Unit 3 series take up rational expressions.
The first video demonstrates how to find values that are excluded from the domain of rational expressions. Viewers then see how...

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#### EngageNY Algebra I Curriculum

The Algebra 1 curriculum set is designed to help scholars develop fluency in
writing, interpreting, and solving linear equations, The 30 lessons in Module 1 are divided into four topics: An Introduction to Functions, the Structure of...

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#### EngageNY Precalculus and Advanced Topics Module 2: Vectors and Matrices

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#### Complex Numbers (Part 1)

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#### Complex Numbers (Part 1)

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#### Complex Numbers (Part 2)

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#### Complex Numbers (Part 2)

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#### More Complicated Order of Operations Example

Demonstrating a "really hairy and beastly problem," Sal again shows the power and importance of solving an equation according the order of operations. Additionally, he guides viewers through a step in the equation when there are multiple...

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#### Introduction to Order of Operations

First demonstrating the improper ways of solving an equation (left-to-right, multiplication first), Sal shows viewers how the answer of an equation can be drastically incorrect by neglecting to use the order of operations. He uses...

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#### Order of Operations

Please Excuse My Dear Aunt Sally - or whichever mnemonic your students use for the order of operations - is the focus of this video. Sal takes viewers through various mathematical equations which require the use of the order of...

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#### Dividing Mixed Numbers

Before Sal can divide a mixed number, he has to rewrite it as an improper fraction. He explains that dividing a fraction is the same as multiplying it by its reciprocal and that you can "cancel out" numbers to make multiplying easier.

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#### Adding Whole Numbers and Applications 1

Adding double-digit numbers can seem difficult for some students. But, this Khan Academy video makes this process clear in a developmentally sound way. Students watch as 'Sal' adds the number 46 to 43. He references each number by its...

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#### Study Jams! Determine the Missing Operation in an Equation

Deepen the number sense of your math class with a short presentation on writing equations. Using the relationship between numbers, young mathematicians learn how to determine the missing operator in an equation. A number of opportunities...

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#### Multiplying Whole Numbers and Applications 4

Are your students learning about solving word problems involving multiplication? If they are, then this video could be a perfect complement to your lesson. Sal shows students how to use rounding to estimate the product of a double-digit...

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#### How Do You Compare Two Whole Numbers?

Two very similar numbers and you have to figure out which one is larger. The teacher diagrams a place value chart and shows you how to write the two numbers to make a comparison.

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#### How Do You Put Whole Numbers in Order From Greatest to Least?

So you want to put some given values in order from greatest to least? The instructor starts out by drawing a place value chart. She then inserts all the numbers into the chart. This helps you visually see their value so you can compare...

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- Whole Number Operations
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