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Topic 1 - If the signs are different it is the same as...

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*RATIONAL NUMBERS* As you investigated the problems in this topic, you refreshed your memory of positive and negative rational numbers, including whole numbers, fractions and decimals. Let's review each type of number: Whole numbers are the natural numbers, plus zero Integers are whole numbers and their opposites. Rational numbers are any number that can be written as the quotient of two integers, where the denominator is not zero. Look again at how these numbers are related to each other. **When working with the algebra tile and number line models for integers, you should have noticed some patterns when combining positive and negative integers. If the signs are the same, you will add, and keep the same sign. For example:
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Unformatted text preview: If the signs are different, it is the same as subtraction, and you will keep the sign of the number that is farthest from 0 on the number line. For example: ***You also reviewed the patterns of working with fractions. When multiplying two fractions, multiply the numerators to find the numerator of the answer. Multiply the denominators to find the denominator of the answer. When dividing two fractions, multiply the first fraction by the reciprocal of the second fraction. Make 2 into a fraction by making the denominator 1 Multiply the first fraction by the reciprocal of the second fraction ****Finally, you reviewed the order of operations for evaluating mathematical expressions....
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