3) 2,929*8,356+2,929*1,644=24,474+4,815=29,2892,929*(8,356+1,644)=2,929*10=29,294) 47,612*3,21-47,512*3,21=152,834-152,513=0,32(47,612-47,512)*3,21=0,1*3,21=0,321