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Ananemtanu
a fost răspuns

calculati-(6+12+18+24+.........+60)impartit(3+6+9+.....+30)

Răspuns :

Edy175
6×(1+2+3+4+...10)÷3×(1+2+3+...10)=
(1+2+3+4+...+10)×6÷3=
(1+2+...10)×2=
(10×11)÷2×2=
110÷2×2=
55×2=110

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