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

Toán Lớp 7: Kết quả phép tính (1/4 – 1/2)^2 ÷ (1/3 – 2/3 + 5) bằng? Giúp với ạ

Toán Lớp 7: Kết quả phép tính (1/4 – 1/2)^2 ÷ (1/3 – 2/3 + 5) bằng?
Giúp với ạ

Comments ( 2 )

  1. ( 1/4 – 1/2)^2 : ( 1/3 – 2/3 + 5)
    = ( 1/4 – 2/4)^2 : ( 1/3 – 2/3 + 15/3)
    = (-1/4)^2 : 14/3
    = 1/16 : 14/3
    = 1/16 . 3/14
    = ( 1 . 3)/( 16 . 14)
    = 3/224
    #caty09

  2. (1/4-1/2)²: (1/3-2/3+5)
    = (-1/4)²:(-1/3+15/3)
    =1/16:14/3
    = 1/16 . 3/14
    =3/224
     

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