Question

calcule o valor das seguintes expressões com calculo

Answer 1

Olá Amigo!!!!

a) 81+ (-20) ×4

=81+(−80)=  

= 1

b) (-4) × (-7) -30

=−2

c) -23 - (-6) × (+3)

=−23−(−18)=  

=−5

d) (-9)×(+6)-(+2)×(-27)

=−54−(−54)=  

=0

e)19-(-4)×(+5)

=19−(−20)=  

=39

f)7×(-3)-9×(-6)+11×(-2)

=−21−(−54)+(−22)=  

=33+(−22)=

=11

g)(+5)×(+11)-37-(-2)×(+14)

=55−37−(−28)=  

=18−(−28)=

=46

h)18-3×(-7) +9×(-4)-20

=18−(−21)+(−36)−20=  

=39+(−36)−20=

=3−20=

=−17

Espero ter te ajudado!!!!!

Answer 2

Resposta:

Explicação passo-a-passo:

a)81=(-20)x (=4)

81-80= 1

b)(-4) x (-7) -30

28-30= -2

-2

c)-23- (-6)- (+2)x (-27)

-23+6-2 (27) = 37

   -17-2 (-27)= 37

   -17 - (54) = 37

    -17 + 54 = 37

     37

d) -54-2 (-27) =0

  -54 -(-54) =0

 -54+ 54= 0

  0

e)19- (-4) x (+5)

  19- (-20) = 39

 19+20 =39

 39

f)7×(−3)−9×(−6)+11×(−2)

−21−9(−6)+11(−2)=11

−21−(−54)+11(−2)=11

−21+54+11(−2)=11

33+11(−2)=11

33−22=11

11\

g) (+5)×(+11)−37−(−2)×(+14)

55−37−(−2×14)=46

18−(−2×14)=46

18−(−28)=46

18+28=46

46

h) 18−3×(−7)+9×(−4)−20

18−(−21)+9(−4)−20=−17

18+21+9(−4)−20=−17

39+9(−4)−20=−17

39−36−20=−17

3−20=−17

−17