Question

vamos calcular :
a) +27 +13 -28=
b) -50 -30 -12=
c) +90 -75 -47=
d) -11 +20 +35 -27=
e) +32 -68 -22 +48=
f) +99 -100 -100 +98 -10=
g) -73 -22 +(-45) -92 +250=
deixe calculos

Answer 1

A; 12 b; -92 c; -32 d; 17 e; -10 f; -13 g; 18

Answer 2

a)
+ 27 +13 -28
= 40 - 28
= 12

b)
= - 50 - 30 - 12
= - 80 - 12
= - 92

c)
= +90 - 75 - 47
= 90 - 122
= - 32

d)
= - 11 + 20 + 35 - 27
= 9 + 8
= 17

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e)
= +32 - 68 - 22 + 48
= 32 + 48 - 68 - 22
= 80 - 90
= - 10

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f)
= + 99 - 100 -100 + 98 -10
= - 1 - 2 - 10
= - 3 - 10
= - 13

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g)
= - 73 - 22 + ( - 45) - 92 + 250
= - 73 - 22 - 45 - 92 + 250
= - 95 - 137 + 250
= - 232 + 250
= 250 - 232
= 18