fined
Efectuează:
Model: (7x3)+(7x2)=7x(3+2)=7x5=35
(2x7)+(2x1)=...
(6x5)+(6x4)
4x9)+(3x9)
(4x6)(4x3)= ...
(9x89x1)
(6x3)(2x3)=​