Question

2) Calcule:
a) ( + 12 ) + ( + 21 ) =
b) ( + 13 ) + ( + 7 ) =
c) ( + 23 ) + ( + 21) =
d) ( – 12 ) + ( – 11 ) =
e) ( – 23 ) + ( – 4 ) =
f) ( – 21 ) - ( – 12 ) =
g) ( + 10 ) - ( – 13 ) =
h) ( + 21 ) - ( – 23 ) =
i) ( + 40 ) - ( – 17 ) =
j) + 57 – 31 =
k) – 32 + 25 =
l) – 23 + 12 =
m) – 15 + 13 =
n) – 45 + 40 =
ME AJUDA RAPIDO

Answer 1

Resposta:

a)33

b)20

c)43

d)-23

e)-27

f)-9

g)23

h)44

I)57

j)26

k)-7

l)-11

m)28

n)-5

Explicação passo-a-passo:

a) (12) + ( 21) = 12 + 21 = 33

b) (13) + (7) = 13 + 7 = 20

c) (23) + (21) = 23 + 21 = 43

d) (-12) + (-11) = -12 - 11 = -23

e) (-23) + (-4) = -23 - 4 = -27

f) (-21) - (-12) = -21 + 12 = -9

g) (10) - (-13) = 10 + 13 = 23

h) (21) - (-23) = 21 + 23 = 44

I) (40) - (-17) = 40 + 17 = 57

j) 57 - 31 = 26

k) -32 + 25 = -7

l) -23 + 12 = -11

m) 15 + 13 = 28

n) -45 + 40 = -5