Question

Suma a trei numere consecutive este 81. Care sunt numerele? (metoda grafica)

Answer 1

Răspuns:

a + b + c = 81

a |.........|

b |..........|......| } 81

+2

c |.........|......|......|

+2 +2

1) Egalăm segmentele

81 - ( 2 + 2 + 2 ) = 75

81 - 6 = 75

2) 75 : 3 = 25

a = 25

b = 25 + 2

b = 27

c = 25 + 2 + 2

c = 29

Verificare

25 + 27 + 29 = 81

Answer 2

a=|—|
b=|—|+1
c=|—|+2
a+b+c=81
b=a+1
c=a+2
=>a+a+1+a+2=81
=>3a=81-(1+2)
=>3a=78
=>a=26
=>b=a+1=26+1=27
=>c=a+2=26+2=28
Sper ca te am ajutat
Coroana pls