ADDITION AND SUBTRACTION OF RATIONAL NUMBERS
KEY QUESTION:
How do you know how to add positive integers by counting up and negative integers by counting down?
KEY VOCABULARY:
Positive Number - A real number greater than zero. Zero itself is not positive.
Negative Number - A is a real number that is less than zero.
Number Line - A line with numbers placed in their correct position. It is useful for addition and subtraction, and for showing relations between numbers.
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