Question

resolva as esxpressoes

a)60 : (-10) - [7 x (-3) - (+18) (-2) +1] =

b) 25 - {-12 : 2 + [6-(-2+4) x (5 x 3 - 10)]} + (-2)

Answer 1

60 : ( - 10 ) - [ 7 . ( - 3 ) - ( + 18 ) .( - 2) + 1 ] = 
60 : ( - 10 ) - [ - 21 - ( - 9 ) + 1 ] =
60 : ( - 10 ) - [ - 21 + 9 + 1 ] =
60 : ( - 10 ) - [ - 11 ] =
60 : ( - 10 ) + 11 =
- 6 + 11 = 5
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25 - { - 12 : 2 + [ 6 - ( - 2 + 4 ) . ( 5 . 3 - 10) ] } + ( - 2 ) =
25 - { - 12 : 2 + [ 6 - 2 . ( 15 - 10) ] } - 2 =
25 - { - 12 : 2 + [ 4 . 5 ] } - 2 =
25 - { - 6 + 20 } - 2 =
25 - { 14 } - 2 =
25 - 14 - 2 =
25 - 18 = 9