Inainte faci inmultirea in coloana dupa cum deja stii. Apoi faci verificarea in felul urmator:
69 * 6 = (60 + 9) * 6
= 60 * 6 + 9 * 6
= 360 + 54
= 414
285 * 9 = (200 + 80 + 5) * 9
= 200 * 9 + 80 * 9 + 5 * 9
= 1800 + 720 + 45
= 2565
248 * 7 = (200 + 40 + 8) * 7
= 200 * 7 + 40 * 7 + 8 * 7
= 1400 + 280 + 56
= 1736
1107 * 3 = (1000 + 100 + 7) * 3
= 1000 * 3 + 100 * 3 + 7 * 3
= 3000 + 300 + 21
= 3321
1043 * 6 = (1000 + 40 + 3) * 6
= 1000 * 6 + 40 * 6 + 3 * 6
= 6000 + 240 + 18
= 6258
13 025 * 2 = (10 000 + 3000 + 20 + 5) * 2
= 10 000 * 2 + 3000 * 2 + 20 * 2 + 5 * 2
= 20 000 + 6000 + 40 + 10
= 26 050
116 241 * 2 = (100 000 + 10 000 + 6000 + 200 + 40 + 1) * 2
= 100 000 * 2+ 10 000 * 2+ 6000 * 2+ 200 * 2+ 40 * 2+ 1 * 2
= 200 000 + 20 000 + 12 000 + 400 + 80 + 2
= 232482
Succes!
