Question

calcule:
a) -2 +4 +11 -8 +13 +1
b) +6 + -14 + -7 + +6 + +9
c) -2 + 5 +3 - 2 +1

Answer 1

a) - 2 + 4 + 11 - 8 + 13 +1

     2 +3+14 = 19

b)   +6 + ( -14) + (-7) + ( + 6) + ( +9 )

        6 -14 - 7 + 6 + 9

        -8 -1 + 9 = 0

c) - 2 + 5 + 3 - 2 +1

     3 + 1 + 1 = 5