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

Toán Lớp 6: thực hiện phép tính: 1/4 +3/4 × (- 1/2 +2/3)

Toán Lớp 6: thực hiện phép tính: 1/4 +3/4 × (- 1/2 +2/3)

Comments ( 2 )

  1. 1/4 + 3/4 × (-1/2 + 2/3)
    = 1/4 + 3/4 × (-3/6 + 4/6)
    = 1/4 + 3/4 × 1/6
    = 1/4 + 3/24
    = 6/24 + 3/24
    = 9/24
    = 3/8
     

  2. 1/4 + 3/4 × ( – 1/2 + 2/3 )
    = 1/4 + 3/4 × ( – 3/6 + 4/6 )
    = 1/4 + 3/4 × 1/6
    = 1/4 + 3/24
    = 6/24 + 3/24
    = {6 + 3}/24 = 9/24 = 3/8
    #dtkc
     

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

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