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

Toán Lớp 5: 13/7- x=4/6 gấppppppppppppppppppp

Toán Lớp 5: 13/7- x=4/6
gấppppppppppppppppppp

Comments ( 2 )

  1. Giải đáp:
     25/21
    Giải thích :
     4/6 = 2/3                       2/3 = 14/21 
    13/7 – x = 4/6
               x = 13/7 – 2/3 
               x =39/21 – 14/21
               x = 25/21

  2. Ta có : 4/6 = 2/3
    13/7 – x = 2/3
    ⇒ x = 13/7 – 2/3
    ⇒ x = 39/21 – 14/21
    ⇒ x = 25/21
    Vậy x = 25/21
    ……………………………….
    13/7 – x = 4/6
    ⇒ x = 13/7 – 4/6
    ⇒ x = 78/42 – 28/42
    ⇒ x = 50/42
    ⇒ x = 25/21

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

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