10-N10：整數部分每一位除r取餘，小數部分每一位乘r取整；10→2: (57.75)10 = (111001.110)257/2 1 0.75*2 128/2 0 (1.5-1)*2 114/2 0 (1.0-1)*2 07/2 1 3/2 1 1/2 1 010→8: (80.140625)10 = (120.11)880/8 0 0.140625*8 110/8 2 (1.125-1)*8 11/8 1 (1.0-1)*8 0010→16: (1032493.13671875)10 = (FC12D.23)161032493/16 13 0.13671875*16 264530/16 2 (2.1875-2)*16 34033/16 1 (3.0-3)*16 0252/16 12 15/16 15 0 N10-10:每一位乘以它的權，然後相加；2→10: (111001.110)2 = 1*2^5 + 1*2^4 + 1*2^3 + 0*2^2 + 0*2^1 + 1*2^0 + 1*2^-1 + 1*2^-2 + 0*2^-3 = 32 + 16 + 8 + 0 + 0 + 1 + 0.5 + 0.25 + 0 = (57.75)108→10:(120.11)8 = 1*8^2 + 2*8^1 + 0*8^0 + 1*8^-1 + 1*8^-2 = 64 + 16 + 0 + 0.125 + 0.015625 = (80.140625)10 16→10:(FC12D.23)16 = F*16^4 + C*16^3 + 1*16^2 + 2*16^1 + D*16^0 + 2*16^-1 + 3*16^-2 = 983040 + 49152 + 256 + 32 + 13 + 0.125 + 0.01171875 = (1032493.13671875)10相信上面的嗎 不防試一試