Question

preciso de ajuda nessas expressões (elas são do 7 ano)

Answer 1

d) - 0,666 - [ - 0,75 - ( 3/8 - 1/2 ) + 7/6 ] =
- 6/9 - [ - 75/100 - ( 3/8 - 1*4/8 ) + 7/6 ] =
- 2/3 - [ - 3/4 - ( 3/8 - 4/8 ) + 7/6 ] =
- 2/3 - [ - 3/4 - ( - 1/8) + 7/6 ] =
- 2/3 - [ - 3/4 + 1/8 + 7/6 ] =
- 2/3 - [ - 3*6/24 + 1*3/24 + 7*4/24 ] =
- 2/3 - [ - 18/24 + 3/24 + 28/24 ] =
- 2/3 - [ - 18/24 + 31/24 ] =
- 2/3 - [ 13/24 ] =
- 2/3 - 13/24 =
- 2*8/24 - 13/24 =
- 16/24 - 13/24 =
- 29/24

e) 1/2 - { - 5/6 + [ - 0,444 - ( 1 + 1/3 ) ] } =
1/2 - { - 5/6 + [ - 4/9 - ( 1*3/3 + 1/3 ) ] } =
1/2 - { - 5/6 + [ - 4/9 - (3/3 + 1/3) ] } =
1/2 - { - 5/6 + [ - 4/9 - 4/3 ] } =
1/2 - { - 5/6 + [ - 4/9 - 4*3/9 ] } =
1/2 - { - 5/6 + [ - 4/9 - 12/9 ] } =
1/2 - { - 5/6 - 16/9 } =
1/2 - { - 5*3/18 - 16*2/18 } =
1/2 - { - 15/18 - 32/18 } =
1/2 - { - 47/18 } =
1/2 + 47/18 =
1*9/18 + 47/18 =
9/18 + 47/18 =
56/18 =
28/9

f) - 1,2 - { - [ - 7/10 + ( - 1/3 - 2/5 ) ] + 5/6 } =
- 12/10 - { - [ - 7/10 + ( - 1*5/15 - 2*3/15 ) ] + 5/6 } =
- 6/5 - { - [ - 7/10 + ( - 5/15 - 6/15 ) ] + 5/6 } =
- 6/5 - { - [ - 7/10 - 11/15 ] + 5/6 } =
- 6/5 - { - [ - 7*3/30 - 11*2/30 ] + 5/6 } =
- 6/5 - { - [ - 21/30 - 22/30 ] + 5/6 } =
- 6/5 - { - [ - 43/30 ] + 5/6 } =
- 6/5 - { 43/30 + 5/6 } =
- 6/5 - { 43/30 + 5*5/30 } =
- 6/5 - { 43/30 + 25/30 } =
- 6/5 - 68/30 =
- 6*6/30 - 68/30 =
- 36/30 - 68/30 =
- 104/30 =
- 52/15