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

Toán Lớp 5: Tìm X: A) X:4/9 + 5/9 = 13/18 B) 1/3 : X = 2/3 : 4/3

Toán Lớp 5: Tìm X: A) X:4/9 + 5/9 = 13/18 B) 1/3 : X = 2/3 : 4/3

Comments ( 2 )

  1. a) x : 4/9 + 5/9 = 13/18
        x : 4/9 = 13/18 – 5/9 = 1/6
        x          = 1/6 xx 4/9
        x          = 2/27
    Vậy x = 2/27
    b) 1/3 : x = 2/3
                 x = 1/3 : 2/3 = 1/3 xx 3/2
                 x = 1/2
    Vậy x = 1/2

  2. a) x : 4/9 + 5/9 = 13/18
        x  : 4/9          = 13/18 – 5/9
        x : 4/9           = 13/18 – 10/18
        x : 4/9           = 1/6
        x                    = 1/6 * 4/9
        x                     = 4/54 = 2/27
    b) 1/3 : x = 2/3
                x  = 1/3 : 2/3
                x  = 1/2
    #$Gin :333$
     

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