Question

2. Calcule as adições de sinais IGUAIS
a) -8+9
bi - 12-9
c) +13 + 14 =
d)- 18-22 =
a) +32+28​

Answer 1

a) -8+9 = 1

+ (9 - 8 )

1

b) - 12-9 = -21

- ( 12 + 9 )

-21

c) +13 + 14 = 27

13

+ 14

-----

27

d)- 18-22 = -40

- ( 18 + 22 )

-40

e) +32+28 = 60

3¹ 2

+ 2 8

-------

60