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

Toán Lớp 5: 2/7x x/3 x 4/5 = 2/3 x 4/5 x 6/7

Toán Lớp 5: 2/7x x/3 x 4/5 = 2/3 x 4/5 x 6/7

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    2/7 xx x/3 xx 4/5 = 2/3 xx 4/5 xx 6/7
    8/35 xx x/3 = 8/15 xx 6/7
    x/3 = 16/35 : 8/35
    x/3 = 2
    x = 2 xx 3
    x = 6
    #haducdung2009

  2. 2/7 xx x/3 xx 4/5 = 2/3 xx 4/5 xx 6/7
    2/7 xx x/3 xx 4/5 = 8/15 xx 6/7
    2/7 xx x/3 xx 4/5 = 16/35
    2/7 xx x/3 = 16/35 : 4/5
    2/7 xx x/3 = 4/7
    x/3 = 4/7 : 2/7
    x/3 = 2
    x/3 = 6/3
    Vậy x = 6
    #caty09

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

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