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

Toán Lớp 7: Tính ( tính nhanh nếu có thể ) : ( -2/3 ) ² – 5/8 + √16 – | -1/9 | – 9/24

Toán Lớp 7: Tính ( tính nhanh nếu có thể ) :
( -2/3 ) ² – 5/8 + √16 – | -1/9 | – 9/24

Comments ( 2 )

  1. ( – 2/3 )^2 – 5/8 + \sqrt{16} – | – 1/9 | – 9/24
    = 4/9 – 5/8 + 4 – 1/9 – 9/24
    = ( 4/9 – 1/9 ) + ( – 5/8 – 9/24 ) + 4
    = 1/3 + ( – 15/24 – 9/24 ) + 4
    = 1/3 + ( – 1 ) + 4
    = 1/3 + 3
    =1/3 + 3/3
    = 10/3

  2. ( -2/3 ) ² – 5/8 + √16 – | -1/9 | – 9/24
    = 4/9 – 5/8 +4 – 1/9 -9/24
    = (4/9 – 1/9) -(5/8- 9/24) -1/9
     = 3/9 -(15/24 – 9/24) -1/9
    =3/9 – 1/4 – 1/9
    = 3/9 – 1/9 -1/4
    = 2/9 -1/4
    = 8/36 – 9/36
    = -1/36

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

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