Răspuns :
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819:13=63primul numar
63*3=189 al doilea nr
189*3=567 al treilea nr
63+189+567=819
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819:13=63primul numar
63*3=189 al doilea nr
189*3=567 al treilea nr
63+189+567=819
prin metoda grafica a=1 segment
b=3 segmente
c=9 segmente =>819:13=63 un segment
a=63
b=189
c=567
b=3 segmente
c=9 segmente =>819:13=63 un segment
a=63
b=189
c=567