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Operations w/sign#s

MTH005 Ch 1 Operations with Real Numbers

Addends with Like Signs Add and use the sign of the addends.
Addends with Unlike Signs Find the difference of the absolute values of the numbers. The sign of the sum is the same as the sign of the number with the largest absolute value.
Subtraction with Real Numbers 1) Change the minus sign to a plus sign. 2) Change the subtrahend to its opposite. 3) Use the rules of addition of sign numbers to evaluate the sum.
Opposite of a Difference For any real numbers a and b, -(a - b) = b - a
Multiplication of Sign Numbers To multiply any two real numbers, the sign is 1) Positive if the numbers have like signs. 2) Negative if they have unlike signs.
Multiplying 3 or More Real Number Factors The sign of the product is Positive if there are an even number of negative signs. The product is negative if there is an odd number of negative signs.
Division of Real Numbers The quotient is 1) Positive if the divisor/denominator and dividend/numerator have like signs. 2) Negative if the divisor/denominator and dividend/numerator have unlike signs.
Property of Signs in Quotients If a fraction has 1 opposite sign, the sign can be placed in the numerator, denominator, or in front of the fraction; 2 opposite signs, they can both be removed; 3 opposite signs, any 2 can be removed.
Created by: powens