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

Toán Lớp 6: 7/180 +5/12 ; 9/65 -3/25 ;8/77 -3/121 ;2/3 +-1/6 ; 2/15 +-11/30 ; 11/30-1/2 ;1/21-1/28

Toán Lớp 6: 7/180 +5/12 ; 9/65 -3/25 ;8/77 -3/121 ;2/3 +-1/6 ; 2/15 +-11/30 ; 11/30-1/2 ;1/21-1/28

Comments ( 2 )

  1. 7/180 + 5/12
    = 7/180 + 75/180
    =82/180
    =41/90
    9/65 – 3/25
    = 45/325 – 39/325
    =6/325
    8/77 – 3/121
    =88/847 –  21/847
    =67/847
    2/3 + (-1/6)
    = 4/6 – 1/6
    = 3/6
    = 1/2
    2/15 + (-11/30)
    =4/30 – 11/30
    = -7/30
    11/30 – 1/2
    =11/30 – 15/30
    = -4/30
    = -2/15
    1/21 – 1/28
    =4/84 – 3/84
    = 1/84

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