《因数和倍数》教学课件.ppt
,26=12,34=12,112=12,34=1243=12,26=1262=12,112=12121=12,=,2,6,12,26 12,=,2,6,12,12 2,26 12.,6.,12 3 4.,3 4 12.,03=0010=003=0010=0,:(0).,18,18=1 18,18=2 9,18=3 6,18:.123,18,1,2,3,6,9,18,18,2,21=,22=,2,4,23=,6,24=,8,2,2,4,6,8,,2,7,14,17,25,77,147=2,777=11,7,14,17,25,77,71=7,72=14,73=21,74=28,()3.,3,6,9,12,15,.,.,.,(1)49=36,369。,(4)6 36(),(2)4848。(),(5)9 18 27 36,(),(),(),36,60,8.,2 8 18 24 36 48 27 32 72 40 54 144,6 1236:1+2+3=6.6().28 8 7=1+2+4.2004-40.6,28,496,8128.,