Question

Determine os valores das seguintes operações
a) 25 - ( -8 ) . ( + 2)
b) ( -3) . ( +9)
c) (- 7) . ( + 4) - ( - 3 ( + 9)
d) 5. (- 8) - 3 ( + 10) + 63
e) 31- 9 . ( -2) +64 : ( -2)

Answer 1

Booaa Tardeee :)
a) 25 - ( -8 ) . ( + 2)
25 - (-16)
25 + 16 = +41

b) ( -3) . ( +9) = -27

c) (- 7) . ( + 4) - ( - 3 ( + 9)
-28 - (-27)
-28 + 27 = -1

d) 5. (- 8) - 3 ( + 10) + 63
-40 -30 + 63 = -7

e) 31- 9 . ( -2) +64 : ( -2)
31 + 18 - 32 = +17

Answer 2

Olá

Vamos lá,
a) 25 - ( -8 ) . ( + 2)
=25- (-16)
=25+16
=41

b) ( -3) . ( +9) 
= -3.+9
=-27

c) (- 7) . ( + 4) - ( - 3 ( + 9)
= -28 +27
= -1

d) 5. (- 8) - 3 ( + 10) + 63
= -40 - 30 + 63
= -70+63
= -7

e) 31- 9 . ( -2) +64 : ( -2)
= 31 + 18 - 32
= 49 -32
= 17