十进制的0.110011相当二进制的多少?十进制的0.110011相当二进制的.①2–1+2–2+2–4+2–5②1–(2–3+2–4)③1+(–2–3–2–4)④1–2–3–2–4–2–6

Question

十进制的0.110011相当二进制的多少?
十进制的0.110011相当二进制的______.
① 2–1+2–2+2–4+2–5 ② 1–(2–3+2–4)
③ 1+(–2–3–2–4) ④ 1–2–3–2–4–2–6

Answer 1

这道题的题目有点背,应当是二进制数0.110011相当于十进制数：2^(-1)+2^(-2)+2^(-5)+2^(-6)=0.796875=1-2^(-3)-2^(-4)-2^(-6).也就是选择答案4.
如果是十进制数0.110011的话,相当于二进制数：0.000111.无穷小数.
0.110011*2=0.220022 整数0
0.220022*2=0.440044 整数0
0.440044*2=0.880088 整数0
0.880088*2=1.760176 整数1
0.760176*2=1.520352 整数1
0.520352*2=1.040704 整数1
0.040704*2=.