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

Toán Lớp 7: ( 9 2/4 : 5,2 + 3,4 * 2 7/34 ) : ( -1 9/16 )

Toán Lớp 7: ( 9 2/4 : 5,2 + 3,4 * 2 7/34 ) : ( -1 9/16 )

Comments ( 2 )

  1. (9 2/4 : 5,2 + 3,4 . 2 7/34) : (-1 9/16)
    = (19/2 . 5/26 + 3,4 . 75/34) : (-25/16)
    = (95/52 + 15/2) : (-25/16)
    = 485/52 : (-25/16)
    = 485/52 . (-16/25)
    = -388/65

  2. (9 2/4 : 5,2+3,4 xx 2 7/34):(-1 9/16)
    =(19/2 : 26/5+34/10 xx 75/34):(-25/16)
    =(95/52+15/2).(-16/25)
    =485/52.(-16/25)
    =-388/65

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