Adding and Subtracting Rational Numbers

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What is a rational number?

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A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

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How do you add two rational numbers with different denominators?

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To add two rational numbers with different denominators, find a common denominator, convert each fraction, and then add the numerators.

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What is the process of subtracting rational numbers?

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To subtract rational numbers, you can change the subtraction to addition by adding the opposite (negative) of the second number.

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What does 'keep, change, flip' mean in relation to subtraction?

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'Keep, change, flip' is a method used to rewrite a subtraction problem as an addition problem by keeping the first number, changing the subtraction to addition, and flipping the second number to its reciprocal.

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Front

How do you find the total change in yardage when a team loses and then gains yards?

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Subtract the total lost yards from the total gained yards to find the overall change.

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Convert both mixed numbers to improper fractions, then subtract the lost yards from the gained yards.

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What is the balance in an account after spending more than what is available?

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The balance will be negative, indicating an overdraft.