Arithmetic and Pre-Algebra Teacher Resources
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Most elementary and middle schools just call this "Math". Here we cover everything from counting, number operations, and fractions to evaluating basic expressions and equations. All of this adds up to preparation for the eventual study of Algebra.
Showing 210 resources
Curated OER
How Do You Find Angle Measures for Adjacent Angles?
Two angles with given values are adjacent. Together they are 172.5 degrees. How do you find the degree of one of the angles? You will have to write an algebraic equation with the given information to solve for the value of the variable....
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How Do You Add Fractions with Different Denominators?
You've got three fractions to add together. Wait! They have unlike denominators. So the first thing you have to do is find the least common denominator. Now multiply the terms so they all have the same denominator. Don't forget to...
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How Do You Find Angle Measures for Adjacent Angles?
Two angles with given values are adjacent. Together they are 172.5 degrees. How do you find the degree of one of the angles? You will have to write an algebraic equation with the given information to solve for the value of the variable....
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How Do You Add Two Negative Numbers?
A very simple explanation of adding two negative numbers together. Well, it's a mathematical explanation that includes moving the negative and using absolute value. Just watch the instructor as she shows you the steps and it will make...
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How Do You Add Two Negative Numbers?
A very simple explanation of adding two negative numbers together. Well, it's a mathematical explanation that includes moving the negative and using absolute value. Just watch the instructor as she shows you the steps and it will make...
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How Do You Add a Negative Number to a Positive Number?
Combine a negative number with a positive number. How? Follow along and see the instructor explain what to do.
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How Do You Add Polynomials Vertically?
The instructor demonstrates how to line up two polynomials vertically to add them together. She emphasizes lining up the terms with the same powers. She also identifies some places where there is no term and shows how to write a...
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How Do You Add Mixed Fractions with the Same Denominator?
Mixed fractions? Oh, everyone's favorite! Not really. But these two have a common denominator so you can add the whole numbers together and then you can add the fraction parts together. Don't forget to simplify.
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How Do You Add Mixed Fractions with the Same Denominator?
Mixed fractions? Oh, everyone's favorite! Not really. But these two have a common denominator so you can add the whole numbers together and then you can add the fraction parts together. Don't forget to simplify.
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Matrix Madness!!
Perform operations to add, subtract, multiply and divide matrices. Then solve problems with vectors using matrices. A three day lesson: Matrix Madness, Mystical Matrices, and Decode the Encode. The last lesson has prizes that the class...
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Adding and Subtracting Integers
Students add and subtract integers. In this algebra lesson, students add, subtract, multiply and divide integers. They apply the properties of numbers as they solve equations.
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Adding/Subtracting Decimals
In this decimal worksheet, students find the sum and difference of positive and negative decimal numbers. Equations contain two to three terms, with multiple operations. Thirty addition and subtraction problems are on this worksheet. ...
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Get a Line on Integers
Students explore number sense by completing math function problems in class. In this integers instructional activity, students define integers and practice plotting them on a number line. Students utilize math functions such as addition...
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Two-Step Equations with Decimals
In this two-step equation worksheet, students use two-steps to solve for the unknown. Problems involving using addition, subtraction addition, and multiplication. This worksheet contains 18 problems and does contain an answer key.
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Multi-Step Equations
In this multi-step equation, students solve for the unknown. Equations contain at least two operations, addition, subtraction and/or multiplication. Students use their algebra steps to solve 26 problems on the two pages. The remaining...
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Slope
In this slope worksheet, students solve and complete 26 various types of problems. First, they find the slope of each line illustrated on the grid. Then, students find the slope of the line through each pair of points. In addition, they...
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Understanding Inequality Operation Rules
Young scholars solve problems within-inequalities. In this algebra instructional activity, students apply concepts of addition, subtraction, multiplication and division to solve inequalities.
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Ordered Pairs on a Coordinate Plane
Seventh graders identify the quadrants and axis of a coordinate plane. In this algebra lesson, 7th graders discover the correct way to graph using the coordinate plane. They discuss the relationship between x and y values, domain and...
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Decode Word Is..
Students solve problems using patterns. In this algebra lesson, students identify the relation, domain and range of a function. They graph functions using coordinate pairs.
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Variables
In this algebra activity, students solve for the variables in the addition and subtraction problems. Students complete 72 problems.
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Ordering, Adding and Subtracting Integers
Prealgebrarians use colored chips, stickers, and pencils to explore the world of integers. They discover absolute value, compare positive and negative integers, and apply operations to them. A detailed procedure for the three-part...
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Subject and Predicates, Oh My!
Eliminate all doubt when it comes to sentence structure with nine thorough lesson plans. Whether you want your young writers to vary their sentence structure or shore up their knowledge of conjunctions and semicolons, these lessons are a...
Krista King Math
Power Rule for Exponents
Discover the power to simplify expressions. Viewers learn how to simplify expressions involving powers of exponents. The video covers five examples of this type of problem.
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Understanding Proportions and Scale Drawings
Proportions are ratios found using multiplication or division. Middle schoolers solve measurement problems, find a figure's missing dimension, and find the distance between two points. Resource features four lesson plans with detailed...
