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

Toán Lớp 7: 4`5/8`:`(-5/7)`+5`4/9`:`(-5/7)`

Toán Lớp 7: 45/8:(-5/7)+54/9:(-5/7)

Comments ( 2 )

  1. Giải đáp:
    4 5/8 : ( -5/7 ) + 5 4/9 : ( -5/7 )
    = 37/8 xx ( -7/5) + 49/9 xx ( -7/5)
    = -7/5 xx ( 37/8 + 49/9 )
    = -7/5 xx 725/72
    = -1015/72
     

  2. Answer
    4 5/8 : {-5}/7 + 5 4/9 : {-5}/7
    = 37/8 . {-7}/5 + 49/9 . {-7}/5
    = -7/5 . (37/8 + 49/9)
    = -7/5 . 725/72
    = -1015/72

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

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