Question

Alguém me ajuda por favor.

Efetue:

a) -3 -{ -2 - [ (-35) : (+5) +2 ₂ ] }

b) (⅓+½) - (⅚- ¾)

c) (5/2 - ⅓ - ¾) - ( ½ + 1 )

d) (¼ + ½ +2) + (⅙ + ⅔)

Answer 1

a) -3- {-2-[-7+4]} = -4
-3-{-2+3}
-3-1 = -4

b) (2/6+3/6) - (10/12-9/12)
5/6- 1/12 =
10/12- 1/12= 9/12

c) (30/12-4/12-9/12) - 1 1/2
17/12 - 1 6/12 = 1/12

d) (1/4+2/4+2) + (-1/6+4/6)
2 3/4 + 3/6
2 9/12 + 6/12
3 1/4 = 13/4