Question

1 - calcule:
a) 6 + ( - 5 + 8 + 0 - 4)
b) 9 + ( 3 - 5 ) + ( - 6 - 2 )
c) 10 - ( - 6 + 8 ) - ( - 1 + 3 + 4)
d) - 20 - ( 7 + 4 - 6 - 3 ) - 1 + 2​

Answer 1

a) 6 + ( - 5 + 8 + 0 - 4) = 5

b) 9 + ( 3 - 5 ) + ( - 6 - 2 ) = -1

c) 10 - ( - 6 + 8 ) - ( - 1 + 3 + 4) = 2

d) - 20 - ( 7 + 4 - 6 - 3 ) - 1 + 2 = -21