a) 2/4 + (- 2/7) : 5/14 =
2/4 - 2/7 : 5/14=
2/4 - 2/7 . 14/5 =
2/4 - 28/35 =
70/140 - 112/140 = 42/140 = 21/70= 3/10
b) 3 . ( - 2/7) + ( -9/11) ; ( - 3)
3 . -2/7 - 9/11 : 3
-6/7 - 9/11 . - 1/3
-6/7 + 9/33 = - 198/231 + 63/231 = 135/231 = - 45/77
c) [ 2 - ( - 5/2) : ( 11/4) . ( - 11/4)
[ 2 + 5/2 : 11/4 ] . - 11/4
[ 2 + 5/2 . 4/ 11 ] . -11/4
[ 2 + 20/22 = 44/22 + 20/22 = 64/22 = 32/11] . - 11/4
32/11 . -11/4 = - 352/44 = -8
d) 1 + ( - 2/3) . (-6/5)
1 - 2/3 . - 6/5
1 + 12/15 = 15/15 + 12/15 = 27/15 = 9/5
e) - 2 - 2/3 . (5/7 - 8/7)
- 2 - 2/3 . -3/7
- 2 + 6/21 = -42/21 + 6/21 = - 36/21 = -12/7
f) 2/5 + ( -7/2) . ( - 4/15)
2/5 - 7/2 . - 4/15
2/5 + 28/30 = 12/30 + 28/30 = 40/30 = 4/3
g) 32 : [ 32: ( 2 - 5 . 2 ) - 4 ] - 4
32 : [ 32 : ( 2 - 10) - 4 ] - 4
32 : [ 32 : - 8 - 4 ] - 4 obs. essa letra G não sei se está certa.
32 : 32 : - 16 = - 16
h) ( 8 . 6 - 16 ) : (- 4 - 2 : 2 )
( 48 - 16 ) : ( - 4 - 1 )
32 : - 5 = - 6,4
i) ( 26 - 16 : 2 ) . ( -13 + 4 . 3 )
( 26 - 8 ) . ( - 13 + 12 )
18 . - 1 = - 18
j) [ - 16 : ( - 1 + 3 . 3 ) + 3 ] . 4 -1
[ - 16 : ( - 1 + 9 ) + 3 ] . 4 - 1
[ - 16 : 11 ] . 4 - 1
- 1,45 . 4 - 1
- 5, 8 - 1 = - 6,8 essa tbm não tenho certeza do resultado
