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二进制数00111001转换成十进制数是()。

A、58
B、57
C、56
D、41
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正确答案:

B

答案解析:

答案解析:非十进制转换成十进制数的方法是,把各个非十进制数按 权展开求和即可。即把二进制数写成 2 的各次幂之和的形式,然后计 算其结果。 (00111001)B=1*2^5+1*2^4+1*2^3+1*2^0=57(D) 。

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