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

Toán Lớp 7: `30/31xx(-7/5+3/15+(-7)/20)` Tính :))))))))

Toán Lớp 7: 30/31xx(-7/5+3/15+(-7)/20)
Tính :))))))))

Comments ( 2 )

  1.  30/31x(-7/5+3/15+\frac{-7}{20})
    = 30/31 x ( -84/60 + 12/60 + \frac{-21}{60})  
    =30/31 × \frac{-93}{60}
    = 3/2
     

  2. Giải đáp:
     = 3/2
    Lời giải và giải thích chi tiết:
    30/31 × (-7/5 + 3/15 + (-7)/20)
    = 30/31 × (-84/60 + 12/60 + (-21)/60)
    = 30/31 × (-72/60 + (-21)/60)
    = 30/31 × (-93)/60
    = 1/1 × 3/2
    = 3/2

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

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