exercitiul 8
6x(5+9) = 6x5+6x9
(8+6)x5=8x5+6x5
8x(10+0)=8x10+8x0
7x(3+6+8)=7x3=7x6+7x8
exercitiul 9
5x(5+2)=5x7 sau 5x5+5x2
(3+2+4)x10=9x10 sau 3x10+2x10+4x10
8x(6-3)=8x3 sau 8x6-8x3
(5+1+2)x9=8x9 sau 5x9+1x9+2x9
(2+4)x9=6x9 sau 2x9+4x9
8x(7-3)=8x4 sau 8x7-8x3
(5-3)x6=2x6 sau 5x6-3x6
10x(4+3-2)=10x5 sau 10x4+10x3-10x2
