Subtracting, Multiplying & Dividing Real numbers

the difference a-b is the number c, a=b+c

a-b=a+(-b)

for any real number "a" and "b" (to subtract add the opposite, or additive inverse of the number being subtracted)

multiply a positive and a negative the answer is negative


Multiply two negatives and the answer is positive

smae sign = positive
different signs = negative

the quotient a divided b or a/b where b is not equal to 0 is that unique real number c for which a=a x b

to multiply or divide two real numbers (where the divisor in nonzero)

A) multiply or divide by the absolute values\

B) If the signs are the same, the answer is positive

C) if the signs are different, the answer is negative