Question

1 °calcule as propriedades

a) ( - 7 ) × ( - 8) × ( + 3) =
b) ( + 4) × ( - 7 ) × ( + 9) × ( -11) =
c) ( + 8 ) × ( - 6) × ( - 3 ) × ( - 2 ) × ( - 1) =
d) ( - 5 ) × ( - 6) × ( - 3 ) × ( -2 ) × ( - 1)
2° Calcule:

a ) - 30 - 5 × [ ( - 1 ) × ( 15- 3× 6) + 9 - 3×4]
b) - 5 + [ ( -20) × ( - 15 + 30) × ( -1 ) ]
c) 18 + 4 [ - 6 - 4 × ( - 5 + 6) ]

3° RESOLVA AS PROPRIEDADES

a) ( -3) × ( - 20 +7)=
b) ( + 15 - 18) × ( -5)=
c) 2× ( 7+5)=
d) ( - 3 ) × ( - 20 + 7)
e) ( 25 - 18) × (-5) =

4° ) Calcule:

a) 2× [( + 19 ) ] + ( - 4 ) ] =
b) ( - 7 ) × ( + 1 ) l=
c) - 5 × ( 4 + 2) =​

Answer 1

Resposta:

1º Calcule as propriedades:

a) -53

b) 6

c) -1

d) -17

2º Calcule

a) -71

b) 294

c) 13

3º RESLVA AS PROPRIEDADES

a) -16

b) -8

c) 19

d) -16

e) 2

4º

a) 30 2xI(+19) I + (-4) I < 2x (+19-4)I = 2x15

b) -6

c) -30 <-5 x (4+2) -5x(6)

Explicação passo a passo: