Answer
(a) Sum: $12$
(b) Difference: $-4$
(c) Product: $32$
Work Step by Step
RECALL:
(1) For any real number $a$, $a + 0 = a$.
(2) For any real number $a$, $a(0) = 0$.
(3) $a-b=a+(-b)$.
(4) The product of two integers with the same sign is positive.
The sum, difference, and product of the given expressions are:
(a) Sum: $(+4) + (+8) = +12=12$
(b) Difference: $(+4) - (+8) = -4$
(c) Product: $(+4)(+8) = +32=32$
