Matemática, perguntado por jkdl, 9 meses atrás

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

Respondido por Usuário anônimo
1

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

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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

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g) - 6 . ( + 2) – ( - 3) . ( +6) – 4

= - 3 + 3.6 - 4

= - 7+18

= 11

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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

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j)

=+ ( -20) : ( -5) +( -6) +( -7) .( - 3) -12

= -20:(-5) - 6 - 7.(-3) - 12

= 4 - 6 + 21 - 12

= - 2 + 9

= 7

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