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

Toán Lớp 7: -2/15 + 3/10 bằng bao nhiêu vậy ?

Toán Lớp 7: -2/15 + 3/10 bằng bao nhiêu vậy ?

Comments ( 2 )

  1. -2/15+3/10
    =-4/30+9/30
    =$\dfrac{-4+9}{30}$ 
    =5/30
    =1/6 

  2. -2/{15} + 3/{10} 
    = -4/{30} + 9/{30}
    = 5/{30}
    = 1/{6} 

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

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