Răspuns:
85x9=(80+5)x9=80x9+5x9=720+45=765
5x74=5x(70+4)=5x70+5x4=350+20=370
8x49=8x(40+9)=8x40+8x9=320+72=392
75x6=(70+5)X6=70x6+5x6=420+30=450
38x6=(30+8)X6=30x6+8x6=180+48=228
9x96=9x(90+6)=9x90+9x6=810+54=864
6x79=6x(70+9)=6x70+6x9=420+54=474
7x54=7x(50+4)=7x50+7x4=350+28=378
48x8=(40+8)x8=40x8+8x8=320+64=384
5x84=5x(80+4)=5x80+5x4=400+20=420
4x36=4x(30+6)=4x30+4x6=120+24=144
7x88=7x(80+8)=7x80+7x8=560+56=616
