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1.Ê®½øÖÆ ÓÐ0-9 10¸öÊý×Ö
1234=1*10^3+2*10^2+3*10^1+4*10^0
2.¶þ½øÖÆ ÓÐ0 1Á½¸öÊý×Ö
101=1*2^2+0*2^1+1*2^0
3.°Ë½øÖÆ ÓÐ0-7 8¸öÊý×Ö
1234=1*8^3+2*8^2+3*8^1+4*8^0
4. Ê®Áù½øÖÆ ÓÐ0-9 a-f 16¸ö
1a7ef=1*16^4+10*16^3+7*16^2+14*16^1+15*16^0