Question

Calcule a + b + c + d quando a = - 3, b = -7, c = 2 e d = -12

Calcule x + y + z para

A) x = +10, y = +12 e z = -15

B) x = -20, y = -40, z = +30

Answer 1

1) Calcule a + b + c + d quando a = - 3, b = -7, c = 2 e d = -12. Resposta: -20

(-3)+(-7)+2+(-12)

-3-7+2-12

-10+2-12

-8-12

-20

2)Calcule x + y + z para

A) x = +10, y = +12 e z = -15. Resposta: 7

10+12+(-15)

10+12-15

22-15

7

B) x = -20, y = -40, z = +30. Resposta: -30

(-20)+(-40)+30

-20-40+30

-60+30

-30