1：八進(jìn)制數(shù)2=二進(jìn)制數(shù)010,八進(jìn)制數(shù)7=二進(jìn)制數(shù)111,所以八進(jìn)制數(shù)207=二進(jìn)制數(shù)010000111
2：八進(jìn)制數(shù)76=十進(jìn)制（7×8+6）=十進(jìn)制數(shù)62
3：76=1×64+1×8+1×4,所以十進(jìn)制76.5=二進(jìn)制1001100.1
4：二進(jìn)制1011.101=十進(jìn)制（1×8+1×2+1+1/2+1/8）=十進(jìn)制11.625
5：十六進(jìn)制數(shù)A=二進(jìn)制1010,十六進(jìn)制數(shù)3=二進(jìn)制11,十六進(jìn)制數(shù)D=二進(jìn)制1101,所以十六進(jìn)制數(shù)A3D=二進(jìn)制101000111101