Question

Elimine as parênteses e calcule

(+15)+(+9)=
(+22)+(+31)=
(-13)+(-15)=
(+29)+(-41)=
(-36)+(+17)=
+5+7=
+2-7=
-12-29=
-57+17=
+89-21=
-100-10=​

Answer 1

Resposta:

a) (+15)+(+9)=

+ 15 + 9

+ 24

b) (-22) + (+31)=

- 22 + 31

+ 9

c) (-13) + (-15)=

- 13 - 15

- 28

d) (+29) + (-41)=

+ 29 - 41

- 12

e) (-36) + (+17)=

- 36 + 17

- 19

f) (+31) + (-19)=

+ 31 - 19

+ 12

g) +5 +7 =

+ 12

h) +2 - 16=

- 14

i) - 12 - 29=

- 41

j) -57 +17=

- 40

k) +89 -21=

+ 68

l) -100 -10=

-110