Question

calcule as adições

a) (+18)+(-24)+(6)

b) (-7)+(-12)+(+4)+(+13)

c) (+89)+(-54)+(-18)+(+23)

d) (-124)+(+24)+(-30)

e) (+9)+(-9)+(-6)+(+6)

f) (-18)+(+22)+(-36)+(+10)+(+7)

Answer 1

a)
(+18)+(-24)+(6)=
18-24+6=
24-24=
0

b)
(-7)+(-12)+(+4)+(+13)=
-7-12+4+13=
-19+17=
-2

c)
(+89)+(-54)+(-18)+(+23)=
89-54-18+23=
112-72=
40

d)
(-124)+(+24)+(-30)=
-124+24-30=
24-154=
-130

e)
(+9)+(-9)+(-6)+(+6)=
9-9-6+6=
15-15=
0

f)
(-18)+(+22)+(-36)+(+10)+(+7)=
-18+22-36+10+7=
-54+39=
-15

Answer 2

a) 18 - 24 + 6 = 24 - 24 = 0

b) -7 - 12 + 4 + 13 = -19 + 17 = -2

c) 89 - 54 - 18 + 23 = 112 - 72 = 40

d) -124 + 24 - 30 = -154 + 24 = -130

e) 9 - 9 - 6 + 6 = 15 - 15 = 0

f) -18 + 22 - 35 + 10 + 7 = -53 + 39 = -14