a) ( - 3) . ( - 8) + 12 : ( - 4) =
b) ( - 6 ) : ( -2) – ( -8 ) + ( -12) : ( +4) =
c) – ( + 12) . ( - 3) – 5 - ( - 7 ) : ( +7) – 4 =
d) + ( - 10 ) : ( - 5 ) – ( -16) : ( + 2) – ( - 3) =
e) – ( - 20) : ( -4) + ( - 7) . ( - 2) – ( - 15) : ( +3) – 2 =
f) ( - 45) : ( +3) – 7 . ( +2) – 8 + 5=
g) -6 . ( + 2) – ( - 3) . ( +6) – 4 =
h) ( -6 ) . ( + 3 ) – ( - 2 ) – ( +8) =
i) – ( - 6 ) – ( - 3) . ( - 1) – ( +18) : ( - 3) =
j) + ( - 20) : ( - 5) + ( - 6) + ( - 7 ) . ( - 3) -12
Soluções para a tarefa
Resposta:
Explicação passo-a-passo:
A) ( - 3) . ( - 8) + 12 : ( - 4)
= + 24 - 3
= + 21
________
b) ( - 6 ) : ( -2) – ( -8 ) + (-12) : ( +4)
= 3 + 8 + (-3)
= 8-3+3
= 8
-----------
c) – ( + 12) . ( - 3) – 5 - (-7) : (+7) – 4 =(-12).(-3) - 5 + 7:7 - 4
= 4 - 5 + 1 - 4
= - 1 - 3
= - 4
__________
d) + ( -10 ) : ( -5) – (-16):( +2) – ( - 3) = -10 :(-5) + 16:2 + 3
= 2 + 8 + 3
= 10+3
= 13
_________
e)
– (-20) : (-4) +(-7) . (-2)-(-15):(+3) – 2
= 20:(-4) -7.(-2) +15:3-2
= - 5 +14 + 5 - 2
= 9 + 3
= 12
________
f) ( - 45) : ( +3) – 7 . ( +2) – 8 + 5
= - 15 - 14 - 3
= - 29 - 3
= - 32
----------
g) - 6 . ( + 2) – ( - 3) . ( +6) – 4
= - 3 + 3.6 - 4
= - 7+18
= 11
----------
h) ( -6 ) . ( + 3 ) – ( - 2 ) – ( +8)
= -18 + 2 - 8
= - 16 - 8
= - 24
_______
i) – ( - 6 ) – ( -3) . (-1) – (+18) : (- 3)
= 6 + 3.(-1) - 18:(-3)
= 6-3 + 6
= 3+6
= 9
---------
j)
=+ ( -20) : ( -5) +( -6) +( -7) .( - 3) -12
= -20:(-5) - 6 - 7.(-3) - 12
= 4 - 6 + 21 - 12
= - 2 + 9
= 7