Question

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responda as expressões
A) 10 - [ -5 - (2-6) +4 ]

B) 18 - [ -4 + 6 - ( -3+1 ) ]

C) - 3 + [ + 1 - ( + 4 - 1 ) + 1 ]​

Answer 1

Siga a resolução da questão

Item a:

$\sf{10 - ( - 5 - ( 2 - 6) + 4)} \\ \\ \sf{10 - ( - 5 + 4 + 4)} \\ \\ \sf{10 - ( - 1 + 4)} \\ \\ \sf{10 - ( + 3)} \\ \\ \sf{10 - 3} \\ \\ \red{\boxed{ \sf{7}}}$

Item b:

$\sf{18 - ( - 4 + 6 - ( - 3 + 1))} \\ \\ \sf{18 - ( - 4 + 6 - (- 2))} \\ \\ \sf{18 - ( - 4 + 6 + 2)} \\ \\ \sf{18 - ( + 2 + 2)} \\ \\ \sf{18 - ( + 4)} \\ \\ \sf{18 - 4} \\ \\ \red{\boxed{ \sf{14}}}$

Item c:

$\sf{ - 3 + ( + 1 - ( + 4 - 1) + 1)} \\ \\ \sf{ - 3 + ( + 1 - ( + 3) + 1)} \\ \\ \sf{ - 3 + ( + 1 - 3 + 1)} \\ \\ \sf{ - 3 + ( - 2 + 1)} \\ \\ \sf{ - 3 + ( - 1)} \\ \\ \sf{ - 3 - 1} \\ \\ \red{\boxed{ \sf{ - 4}}}$

Att: José Armando