Respuesta:
[tex]345 \times (6 + 4) = 6 + 4 \\ 345 \times 10 = 6 + 4 \\ 3450 = 10 \\ 643 \times (3 + 5) = 3 + 5 \\ 643 \times 7 = 3 + 5 \\ 5144 = 7 \\ (225 \times 9) \times 5 = 225 \times 9 \\ 900 \times 5 = 225 \times 9 \\ 4000 = 900[/tex]
espero q te ayude
