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

Toán Lớp 8: 2s/(s/12)+(s/6) bằng bao nhiêu ạ

Toán Lớp 8: 2s/(s/12)+(s/6) bằng bao nhiêu ạ

Comments ( 1 )

  1.       {2s}/{s/12+s/6}
    ={2s}/{s/12+{2s}/12}
    ={2s}/{{s+2s}/{12}}
    ={2s}/{{3s}/{12}}
    ={2s}/{s/4}
    =2s:s/4
    =2s*4/s
    =8

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

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