Question

Suma a cinci numere consecutive impare este 75.Afla numerele

Answer 1

a+(a+2)+(a+4)+(a+6)+(a+8)=75
5a+20=75
5a=75-20
5a=55
a=55:5
a=11
b=11+2
b=13
c=11+4
c=15
d=11+6
d=17
e=11+8
e=19
proba: 11+13+15+17+19=24+15+17+19=39+17+19=56+19=75

Answer 2

a+1  I---I+1
a+3  I---I+3
a+5  I---I+5
a+7  I---I+7
a+9  I---I+9           }75

Egalam segmentele
75-(1+3+5+7+9) = 75-25 = 50
aflam cat reprezinta un segment
50:5 = 10

Aflam numerele
a+1=10+1 = 11
a+3 = 10+3 = 13
a+5 = 10+5 = 15
a+7 = 10+7 = 17
a+9 = 10+9 = 19

Sper ca te-am ajutat@