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Combined Variation

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

Complete the Square

By Cynthia Sanvidge

In this learning activity you'll practice calculating quadratic equations using the 'completing the square' method.
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An Algorithm for Converting an Octal Number to a Decimal Number

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Learners examine two methods for converting an octal number to a decimal number. Exercises are provided at the end of the learning object.
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An Algorithm for Hexadecimal Subtraction

By Kevin Ritzman

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

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Calculating the Determinant of a 2x2 Matrix

By Roy Peterson

In this learning activity you'll calculate the determinant of a 2x2 matrix.
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Spell the numbers by clicking on the letters below.
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Expression or Equation

Distinguish between expressions and equations
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