Question

5.- Calcula el valor de Las siguientes sumas algebraicas:
a)46 – {38 – (- 2) + - 9 + (42 – 18 + -15) – (-7)} =
b)+4 - 9 - 6 + 8 - 12 + 17 - 13 =
c)18 – [2 – ( 4 + 5 ) + (– 4 + 9)] =

Answer 1

46-(38-(-2)+(-9)+(24-15)-(-7))
46-(38+2-9+9+7)
46-(40-9+9+7)
46-(31+9+7)
46-(40+7)
46-47
-1

-5-6+8-12+17-13
-11+8-12+17-13
-3-12+17-13
-15+17-13
2-13
-11

18-(2-9+5)
18-(-7+5)
18-(-2)
18+2
20