Question

Heii
11+22+33+...+110.
Urgeent ,merci, puncte multe

Answer 1

11+22+33+...+110=11*1+11*2+11*3+...+11*10=11(1+2+3+...+10)=11*$\frac{10*11}{2}$ = 11*5*11=605.

Answer 2

11+22+33+...+110 = 11(1+2+3+....+10) = 11(10×11)/2 = 11 × 5 × 11 = 605