Răspuns:
b:20=800
b=800×20=16000
b:20=480
b=480×20=9600
b:20=920
b=920×20=18400
b:20:2=800
b=800×20×2=32000
b:20:2=480
b=480×20×2=19200
b:20:2=920
b=920×20×2=36800
nu mai am timp sa o fac pe ultima scuzee
