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解き方何となく分かるのですが答えに自信がありません、どうなりますか💦

4 0.111 (②) を10進法の小数で表せ。
10進法

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✨ Best Answer ✨

参考・概略です

 0.111₍₂₎=2⁻¹×1+2⁻²×1+2⁻³×1

    =(1/2)+(1/4)+(1/8)

    =7/8

    =0.875

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