PRIMA COLOANA :
3×( 40-1)=3×39 =117
3×( 427-1)= 3× 426=1278
3×( 43-1) = 3×42=126
3x(410-1)=3×409=1227
3×(43,5-1)=3×42,5=127,5
3×(41-1)=3×40=120
3×(47-1)=3×46=138
A DOUA COLOANA :
1664+10=1674
160+10=170
16729+10=16739
169+10=179
1620+10=1630
1612,25+10=1622,25
161+10=171
1614+10=1624
SPER CA TE-AM AJUTAT !
