1) Calcule o valor de:a) +3+2-4=b) +12+5-8=c) +7-3+5=d) +8-1+2...

Resposta

Explicação passo a passo:

1) Calcule o valor de:

a) +3+2-4= 5-4
= 1
____

b) +12+5-8= 17-8
= 9
_____

c) +7-3+5= 4+5
= 9
_____

d) +8-1+2= 7+2
= 9
______

e) -3+5-2-9= 2-2-9
= - 9
_________

f) +7+8-6-4-3
= 15 -13
= 2
_______

g) -5+4-2-7+3
= - 1 - 9 + 3
= - 10 + 3
= - 7
________

h) +23-45-12+67
= 23+67-57
= 23+10
= 33
_______

i) +72-24-56+13=
= 48-56+13
= -8+13
= 5
---------

j) +68-34-54+43=
= 34-54+43
= 43 -20
= 23
_______

k) -27-35-68-98=
= -62-68-98
= -130-98
= -228
_________

l) +48+25+79-99=
= 73-20
= 53
______
m) +59-43-76+24=
= 16+24-76
= 40-76
= - 36
_________

n) +86-64-78+28=
= 22-50
= - 28

o) +68-65-89-24=
= 3 - 24 - 89
= - 21 - 89
= - 110

p) -46+25-135+47=
= -46+47 - 110
= 1-110
= - 109

q) -90-40-37+62=
= -130 - 37 + 62
= - 167 + 62
= - 105
________

r) +73-87-98+97=
= - 14 - 1
= - 15
_______

s) +27-74-31+38=
= 27-31 - 74 + 38
= - 4 - 74 + 38
= -78+38
= -40
________

t) +88+54+99-43=
142+99-43
= 142-43+99
= -99+99
= 0
___________

u) +87-54-34+33=
= 33-34+33
= -1+33
= 32

v) -20+30+20-30=
=10-10
= 0
______

w) -13+46+13-46
= -13+13+46-46
= 0
______

x) +98-65-87+95
= 33 + 8
= 41
____

y) +77-66+22+55=
= 11 +77
= 88
_______

z) +127-67+86-34=
= 60+52
= 112​