GeoGebra applets

A fraction is a number that describes part of a whole number. Because fractions are numbers just like 5, or 2, or 23, they live on a number line.

When you see a fraction, you need to keep in mind what the two numbers mean. The top number (numerator) represents the number of groups or parts that you can see. The bottom number (denominator) represents the number of groups or parts needed to make one whole.

Use this applet to understand the relationship between an arithmetic sequence and the formula for finding the nth term. For example, if the first four terms of a sequence are

7, 10, 13, and 16, what would be the 50th term in this sequence?

This applet allows you to practice writing an algebraic expression that gives the number of tiles needed to go around a pool.