To negate , attach a negative sign: . Now cancel adjacent negative signs: .
(c) Zero is its own negation.
(d) Add first: , and the negation of .
(e) Subtract first: , and the negation of .
(f) Begin by subtracting: , and the negation of .
4
(a) The number is already positive, so the absolute value of .
(b) The number is negative, so the absolute value of .
(c) First, do the addition inside the absolute value bars: , which is positive. The absolute value of .
(d) First, do the subtraction: , which is positive. The absolute value of . You have a negative sign outside the absolute value bars, so negate your answer to get .
(e) Begin by subtracting: , which is negative. The absolute value of .
(f) The absolute value of .
5
(a) Start at , up .
(b) Start at , down .
(c) Start at , down .
(d) Start at , up .
(e) Start at , down .
(f) Start at , down .
6
(a)18. Switch around the numbers (with their signs) to turn the problem into subtraction:
(b)−9. Drop the plus sign to turn the problem into subtraction:
(c)−79. Drop the signs, add the numbers, and negate the result:
(d)7. Turn the problem into subtraction:
(e)−28. Turn the problem into subtraction:
(f)−537. Drop the signs, add the numbers, and negate the result:
