Unit Plan
CK-12 Foundation

Ck 12: Complex Numbers

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers the powers of i, and adding and subtracting complex numbers, as well as how to plot them in the complex plane. Students examine guided notes,...
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Paul Dawkins

Paul's Online Notes: Complex Numbers: Practice Problems

For Students 9th - 10th Standards
Practice exercise reviews complex numbers including standard form, adding, subtracting, multiplying and dividing them.
eBook
Math Planet

Math Planet: Monomials and Adding or Subtracting Polynomials

For Students 6th - 8th
Gain an understanding of how to add or subtract polynomials by viewing an example and a video lesson.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 6.ns Adding Multiples

For Teachers 6th Standards
This task will provide insight to teachers on students' level of understanding when reasoning about a problem. The task asks students to examine whether the sum of two numbers that are multiples of 6 produces another multiple of 6....
Interactive
Calculator Soup

Calculator Soup: Long Addition Calculator

For Students 9th - 10th
Add whole numbers and decimal numbers using long addition showing work. This calculator shows all the steps for adding numbers with long addition.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Counting Cup

For Teachers K - 1st Standards
Students will count counters, draw a picture of the counters, and record the number in a booklet. A list of materials and how to put together the booklet is included. This activity is most effective if initially it is done daily with all...
Interactive
Study Pad

Splash Learn: Decimal Arithmetic

For Students 5th Standards
[Free Registration/Login Required] This game provides practice in decimal arithmetic including addition, subtraction, multiplication, and division of decimals.
Interactive
AAA Math

Aaa Math: Adding Three Digit Numbers

For Students 2nd - 5th Standards
Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct...
Interactive
Calculator Soup

Calculator Soup: Fractions Average Calculator

For Students 9th - 10th
This calculator finds the average of a set of fractions by adding all of the fractions and dividing by the number of fractions in the set. Enter positive or negative fractions, integers and mixed numbers and the calculator converts...
Unit Plan
TED Talks

Ted: Ted Ed: How to Organize, Add and Multiply Matrices

For Students 9th - 10th Standards
When you're working on a problem with lots of numbers, as in economics, cryptography or 3D graphics, it helps to organize those numbers into a grid, or matrix. Bill Shillito shows us how to work with matrices, with tips for adding,...
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Math Drills

Math Drills: Addition Worksheets

For Students 1st - 5th
Download these worksheets to sharpen your addition skills. Sheets focus on single and multi-digit addition, addition table, column addition, and adding doubles of numbers.
Unit Plan
PBS

Pbs: Gauss Arithmetic Sequence Strategy

For Students 6th - 8th
Learn how mathematician Karl Friedrich Gauss figured out how to sum up any arithmetic sequence without having to add up each and every term. This video focuses on using your critical thinking to follow along as Gauss determines his...

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