Question

c) ( + 5 ) – ( – 3 ) – ( – 1 ) d) ( + 4 ) + ( – 6 ) – ( + 7 ) – ( – 6 ) + ( + 7 ) e) ( – 3 ) – ( – 5 ) + ( – 6 ) + ( + 8 ) – ( – 4 )

Answer 1

é só fazer o jogo de sinais:

(+) (+) = +

(-) (-)= +

(+) (-)= -

c) 5+3+1= 9

d) 4-6-7+6+7= 4

e) -3+5-6+8+4= 8