Question

qual o valor dessas somas algebricas

8-(-6+10)

-10+(6-4)

2+(2+5-7)

-5+(2-4-7)-1

(-5+3)-(5-9+(8-1)-11

Answer 1

= 8 - ( - 6 + 10)
= 8 - (4)
= 8 - 4
= 4

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= - 10 + (6 - 4)
= - 10 + 2
= - 8

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= 2 + (2 + 5 - 7)
= 2 + (7 - 7)
= 2 + 0
= 2

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= - 5 + (2 - 4 - 7) - 1
= - 5 + (2 - 11) - 1
= - 5 + (- 9) - 1
= - 5 - 9 - 1
= - 5 - 10
= - 15

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= (- 5 + 3) - (5 - 9) + (8 - 1) - 11
= - 2 - ( - 4) + 7 - 11
= - 2 + 4 + 7 - 11
= - 2 + 11 - 11
= - 2