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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: `C=9/10-1/90-1/72-1/56-1/42-1/30-1/20-1/12-1/6-1/2` giúp

Toán Lớp 7: C=9/10-1/90-1/72-1/56-1/42-1/30-1/20-1/12-1/6-1/2
giúp

Comments ( 1 )

  1. $\textit{Giải đáp + Lời giải và giải thích chi tiết:}$
    $\text{C = $\dfrac{9}{10}$ – $\bigg(\dfrac{1}{90} + \dfrac{1}{72} + … + \dfrac{1}{6} + \dfrac{1}{2}\bigg)$}$
    $\text{C = $\dfrac{9}{10}$ – $\bigg(\dfrac{1}{1.2} + \dfrac{1}{2.3} + … + \dfrac{1}{9.10}\\bigg)$}$
    $\text{C = $\dfrac{9}{10}$ – $\bigg{1 – \dfrac{1}{2} + \dfrac{1}{2} -…- \dfrac{1}{9} – \dfrac{1}{9} – \dfrac{1}{10}\bigg)$}$
    $\text{C = $\dfrac{9}{10}$ – $\bigg(1 – \dfrac{1}{10}\bigg)$}$
    $\text{C = $\dfrac{9}{10}$ – $\dfrac{9}{10}$}$
    $\text{C = 0}$

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222-9+11+12:2*14+14 = ? ( )