Question

A)-4,2-[2-(1,2+0,2)]=
B)8/13-5/6-2/13+7/6+3/13=
C)-2+3/4+1/4+0,5=
D)-0,25+1/2+3/4+1=
ME AJUDEM PFVR

Answer 1

A)-5,8
B)40/39
C)-1
D)2

Answer 2

a) - 4,2 - [2 - (1,2 + 0,2)] =
- 4,2 - [2 - 1,4] =
- 4,2 - [0,6] =
Resposta: - 4,8

b)8/13 - 5/6 - 2/13 + 7/6 + 3/13 =
8/13 - 2/13 + 3/13 - 5/6 + 7/6 =
9/13 + 2/6 =
9/13 + 1/3 =
(27 + 13)/39 =
Resposta: 40/39

c) - 2 + 3/4 + 1/4 + 0,5 =
- 2 + 3/4 + 1/4 + 0,5 =
- 2 + 4/4 + 0,5 =
Resposta: 0,5

d) - 0,25 + 1/2 + 3/4 + 1 =
- 1/4 + 1/2 + 3/4 + 1 =
(-1 + 2 + 3 + 4)/4 =
8/4 =
Resposta: 2