Question

a) [-6+(-3) • (-4)] • [ 5 - 8 : (+2)] - 13 b) (3-5) • [( 2+12-6) • (-2-4+14-5) + 4]

Answer 1

[-6+(-3) • (-4)] • [ 5 - 8 : (+2)] - 13=
=[-6+12] • [ 5 - 4] - 13=
=6 • 1 - 13=
= 6-13=
=-7


b) (3-5) • [( 2+12-6) • (-2-4+14-5) + 4] =
= (-2) • [ 8 • 3 + 4] =
= (-2) • [ 24 + 4] =
= (-2) •  28 =
=-56

Answer 2

a. [-6+12]·[5-4]-13
⇒6·1-13
⇒6-13=-7;
b. [-2]·[8·3+4]
⇒[-2]·[24+4]
⇒[-2]·28=-56;