Operations with Zero

By Allen Reed, Douglas Jensen

Learners review the basic math operations involving zero, emphasizing that division by zero is undefined. Examples are given.

Grouped Numerical Frequency Distributions: An Overview -- First in a Series

By Thomas Pomykalski

In this interactive object, students read about organizing data in a tabular form. A brief quiz completes the activity. This is the first in a series of six learning objects.

Joint Variation

By Terry Lark

In this learning activity you'll practice calculating a joint variation problem.

Variation - Application Problems

In this learning activity you'll practice two variation application problems.

Statics - Trig: The Pythagorean Theorem

By Steve Whitmoyer

In this interactive object, learners use the Pythagorean Theorem to calculate forces.

Statics - Trig: Law of Sines: Calculations Using a TI-36X Calculator

In this animated object, learners use a TI-36X calculator to determine forces.

Solving Systems of Linear Equations Using the Addition or Subtraction Method

In a series of practice problems, learners use the addition or subtraction method to solve systems of linear equations, also called "simultaneous linear equations."

The Cube

Learners study the properties of a cube and use geometric formulas to find volume and surface area.

The Right Circular Cone

Learners study the properties of a right circular cone and use geometric formulas to find volume and surface area.

Law of Sines

By Roy Peterson

In this learning activity you'll apply the Law of Sines in the solution on an oblique triangle when provided with two angles and the side opposite one of the angles.

Excel: Determining the Complex Conjugate

By Patrick Hoppe

Students read how to use the IMCONJUGATE() function to convert complex numbers to their conjugate in rectangular form.

Numerical Curiosities: Part 4

By Jeganathan Sriskandarajah

In this fourth part in a series, learners follow the steps of the “mathemagician” to examine three numerical curiosities: Be a Psychic by Predicting Birthdays, Predict a Card with Mind Reading, and Predict the Three Die Values Your Opponent Has Rolled. Learners will also study palindromic numbers and look at two alphametric puzzles.

Numerical Data Ordering

In this interactive object, learners read how to arrange numerical data manually by using ascending or descending order. They also practice arranging the data using a spreadsheet.

Ungrouped Numerical Frequency Distributions

Learners follow the steps required to construct an ungrouped frequency distribution using either manual methods or a spreadsheet.

Welcome to the World of Prime Numbers

In this learning activity you'll use a chart and a calculator to find prime numbers 1 and 100.

Creating Histograms

By Mary Lee Rudnick-Kaun

Students follow steps to transfer data from a list to a histogram.

Conversions: Fractions-Decimals- Percents

By Suzi Hunsader

Students recognize the conversions used among fractions, decimals, and percents

The Difference Between -(6)Squared and (-6)Squared

By Arlene Smith

In this learning activity you'll calculate problems using the negative both inside and outside of the parenthesis.

Right Triangles That Are Special: Using the Pythagorean Theorem

By Michele Williams

In this learning activity you'll apply the Pythagorean Theorem to isosceles and equilateral triangles.

Strength of Materials: The Centroid of a Circle

In this animated and interactive object, learners calculate the area and centroid of a circle.

The TI-83 Plus Calculator: Using the LOG Function

Students follow the correct keystrokes to calculate the logarithm of a number.

Statics - Trig: The Pythagorean Theorem Using a TI-36XCalculator

In this animated and interactive object, the learner uses a TI-36X calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.

The Sphere

Learners study the properties of a sphere and use geometric formulas to find volume and surface area.

The Mathematics of Buying: Putting It All Together

Learners tackle this interactive learning object after studying the mathematics of buying. This activity ties together the ideas of net cost, list price, trade discounts, cash discounts, net cost equivalent, and single discount equivalent, as well as the concepts of part, base, and rate.

An Algorithm for Hexadecimal Subtraction

By Kevin Ritzman

Students use the Base Minus One Complement method to perform hexadecimal subtraction.