1)
- ( + 4 - 6 - 9 ) + ( - 4 + 5 - 2 )
= - ( - 11 ) + ( - 1 )
= 11 - 1
= 10
2)
- ( - 3 + 5 + 2 + 1 ) + ( - 5 + 7 + 4 ) =
= - ( + 5 ) + ( + 6 )
= - 5 + 6
= 1
3)
+ ( - 3 + 5 + 2 + 1 ) - ( - 8 - 4 - 9 - 5 ) =
= + ( + 5 ) - ( - 26 )
= + 5 + 26
= 31
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Explicación paso a paso:
1)
- ( + 4 - 6 - 9 ) + ( - 4 + 5 - 2 )
= - ( - 11 ) + ( - 1 )
= 11 - 1
= 10
2)
- ( - 3 + 5 + 2 + 1 ) + ( - 5 + 7 + 4 ) =
= - ( + 5 ) + ( + 6 )
= - 5 + 6
= 1
3)
+ ( - 3 + 5 + 2 + 1 ) - ( - 8 - 4 - 9 - 5 ) =
= + ( + 5 ) - ( - 26 )
= + 5 + 26
= 31