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

Toán Lớp 9: `A=(63/9.18 + 21/14.17) : (14/9.13 + 14/14.18 + 14/3.17)`

Tháng Hai 18, 2023 Toán học 1 Comment 0 views

Toán Lớp 9: A=(63/9.18 + 21/14.17) : (14/9.13 + 14/14.18 + 14/3.17)

Comments ( 1 )

  1. myngocla
    myngocla
    18 Tháng Hai, 2023 at 12:00 chiều
    Reply
    A = (63/(9.18) + 21/(14.17)) : (14/(9.13) + 14/(14.18) + 14/(3.17))
    = ((9.7)/(9.18) + (7.3)/(7.2.17) ) : (14/117 + 1/18 + 14/51)
    = (7/18 + 3/(2.17)) : (476/3978 + 221/3978 + 1092/3978)
    = (7/18 + 3/34) : 1789/3978
    = (119/306 + 27/306) . 3978/1789
    = 73/153 . 3978/1789
    = (73 . 3978)/(153.1789)
    = (73 . 153 . 26)/(153 . 1789)
    = (73 . 26)/1789
    = 1898/1789
    Vậy A = 1898/1789

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

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