In this interactive object, learners simplify ratios and solve problems using proportions. All terms are defined.

In this animated activity, learners read about the properties of a square and its components. They then work practice problems to find the perimeter and area of squares.

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

In this animated and interactive object, learners examine the definitions and formulas for radius, diameter, circumference, and area. Students also solve practice problems involving the circumference and area of a circle.

Students read the rules used in multiplying and dividing signed numbers. They view examples and work practice problems.

Students read how to organize their work when multiplying more than two signed numbers. A review and practice problems complete the activity.

Learners follow the steps for adding and subtracting signed numbers and complete practice exercises.

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

Students solve five problems to determine the total impedance of a series-parallel circuit. Immediate feedback is given.

Sort the Dewey numbers from the smallest to largest number.

Solve the root function with the given x-value.

Practice your addition to become a pro!

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