Question

suma a 5 numere consecutive este 65 . aflati numerele! rezolva prin metoda grafica si prin metoda inlocuirii repedeeee

Answer 1

a |-----|
b |-----|+1|
c |-----|+1|+1|
d |-----|+1|+1|+1|
e |-----|+1|+1|+1|+1|      } 65.

65 - 10 = 55   ( 5 segmente egale)
55 : 5 = 11 (a)
11 + 1 = 12 (b)
11 +1+1 = 13 (c)
11 +1+1+1 = 14 (d)
11 +1+1+1+1 = 15 (e)
Verificare : 11 +12+13+14+15 = 65.

Answer 2

a+a+1+a+2+a+3+a+4 = 65
a      I--I
a+1  I--I+1
a+2  I--I+2
a+3  I--I+3
a+4  I--I+4                }65
egalam segmentele
65-(1+2+3+4) = 65-10 = 55
aflkam  nr.  a
55:5 = 11
aflam nr. a+1
11+1 = 12
aflam nr.a+2
11+2 = 13
aflam nr. a+3
11+3 = 14
aflam nr. a+4
11+4 = 15
Proba
11+12+13+14+15 = 23+13+14+15 = 36+14+15 = 50+15 = 65