Concept explainers
In Exercises 1–4, make the given changes in the indicated examples of this section, and then answer the given questions.
In the first line of Example 1, change the 5 to ‒7 and the ‒19 to 12. What other changes must then be made in the first paragraph?
EXAMPLE 1 Identifying rational numbers and irrational numbers
The numbers 5 and –19 are integers. They are also rational numbers because they can be written as
The numbers
The numbers
The decimal number 1.5 is rational since it can be written as
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