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

Toán Lớp 4: tính: 2/3 : 5/6 + 2/3 x 5/10 3/4 – 4/4 : 3/4 + 5/5

Toán Lớp 4: tính:
2/3 : 5/6 + 2/3 x 5/10
3/4 – 4/4 : 3/4 + 5/5

Comments ( 2 )

  1.    2/3 : 5/6 + 2/3 × 5/10
    = 2/3 : 5/6 + 2/3 × 1/2
    = 4/5 + 1/3
    = 17/15
       3/4 – 4/4 : 3/4 + 5/5
    = 3/4 – 4/3 + 1
    = -7/12 + 1
    = -7/12 + 12/12
    = 5/12

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
      2/3 : 5/6 + 2/3 x 5/10
    = 2/3 x 6/5 + 2/3 x 5/10
    = 2/3 x (6/5 + 5/10)
    = 2/3 x 17/10
    = 2 x 17/3 x 10
    = 34/30 = 17/15
    3/4 – 4/4 : 3/4 + 5/5
    = 3/4 – 4/3 + 5/5
    = 9/12 – 16/12 + 5/5
    = – 7/12 + 1
    = -6/12

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

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