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

Toán Lớp 6: Giá trị biểu thức A=[-5]+7+[-14]+[-23]+71

Toán Lớp 6: Giá trị biểu thức A=[-5]+7+[-14]+[-23]+71

Comments ( 2 )

  1. $\textit{A = ( -5 ) + 7 + ( -14 ) + ( -23 ) + 71}$
    $\textit{A = ( -5 ) + 7 – 14 – 23 + 71}$
    $\textit{A = 2 – 14 – 23 + 71}$
    $\textit{A = ( -12 ) – 23 + 71}$
    $\textit{A = ( -35 ) + 71}$
    $\textit{A = 36}$

  2. A = (-5) + 7 + (-14) + (-23) + 71
    = [ (-5) + (-14) + (-23) ] + ( 7 + 71 )
    = (-42) + 78
    = 36
    => A = 36
    @Rin

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

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