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

Toán Lớp 6: 1/2 + 9/2 +5/2 + 1/2 – 1 HHELLLLLLLLLLLLLLLLLLLLLLLP

Toán Lớp 6: 1/2 + 9/2 +5/2 + 1/2 – 1
HHELLLLLLLLLLLLLLLLLLLLLLLP

Comments ( 2 )

  1. $\dfrac{1}{2} + \dfrac{9}{2} + \dfrac{1}{2} – 1$
    $= (\dfrac{1}{2} + \dfrac{1}{2} – 1) + \dfrac{9}{2} + \dfrac{5}{2}$
    $= (1 – 1) + (\dfrac{9}{2} + \dfrac{5}{2})$
    $= 0 + 7$
    $= 7$
     

  2. 1/2+9/2 +5/2 +1/2-1
    = 1/2 +9/2 +5/2 +1/2 -2/2
    = {1+9+5+1-2}/2
    =14/2
    = 7
    Vậy 7 là kết quả của biểu thức trên . 

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