If we cannot tell at a glance how many objects there are in a group we can count the objects. When we have finished counting the last number we said tells the number of objects in the group. A number like “five” is used to tell how many objects there are in a group of objects is called a *cardinal number.* If we wish to describe the position of the last object in the group, we would use the number word “fifth.” A number like “fifth” which is used to describe the position of an object when it is in a group of objects is called an *ordinal number.*

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