Question

Qual é o valor da expressão: (1/2-1/3):[(-3/22):(-6/21)+(-4/5):(0.2)]

Answer 1

(1/2 - 1/3) : [ (-3/22) . (-21/6) + (-4/5).(10/2)]

(3/6 - 2/6) : [ 63/132 - 40/10] 

1/6 : [ 63/132 - 4 ] 

1/6 : [ 63/132 - 528/132 ]

1/6 : [ - 465/132 ] 

1/6 . -132/465

-132/2790 =  - 22/465              ok

Answer 2

(1/2 - 1/3) : [(-3/22) : (-6/21)+(-4/5) : 0,2]
(3-2)/6 : [(-3/22) . (-21/6) + (-4/5) : 2/10
1/6 : [(-3/22) . (-21/6) + (-4/5) : 1/5]
1/6 : [(-3/22) . (-21/6) + (-4/5) . 5]
1/6 : [(-1/22) . (-21/2) + (-4/5) . 5]
1/6 : [21/44 - 4]
1/6 : [(21 -176)/44]
1/6 : [-155/44]
1/6 . (-44/155)
1/3 . (-22/155)
-22/465