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

Toán Lớp 6: `6/7` . `8/13` + `6/9` . `9/7` – `3/13` . `6/7`

Toán Lớp 6: 6/7 . 8/13 + 6/9 . 9/7 – 3/13 . 6/7

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    6/(7).(8)/(13)+(6)/(9).(9)/(7)-3/(13).(6)/(7)
    =6/(7).(8)/(13)+6/7-3/(13).(6)/(7)
    =6/(7).(8/(13)+1-3/(13))
    =6/(7).(18)/(13)
    =(108)/(91)

  2. 6/7 . 8/13 + 6/9 . 9/7 – 3/13 . 6/7
    = 6/7 . 8/13 + 6/7 . 9/9 – 3/13 . 6/7
    = 6/7 . 8/13 + 6/7 . 1 – 3/13 . 6/7
    = 6/7 . (8/13 + 1 – 3/13)
    = 6/7 . 18/13
    = 108/91

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

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