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

Toán Lớp 6: 3/8×-5/13-5/13×5/8 –.mong giải giúp ạ -..

Toán Lớp 6: 3/8×-5/13-5/13×5/8 ………mong giải giúp ạ ……

Comments ( 2 )

  1. 3/8 . {-5}/13 – 5/13 . 5/8 
    = {-3}/8 . 5/13 – 5/13 . 5/8
    = 5/13(-3/8 -5/8)
    = 5/13 . {-8}/8
    = 5/13 . (-1)
    = -5/13

  2. 3/8 xx (-5/13) – 5/13 xx 5/8
    = (-3/8) xx 5/13 – 5/13 xx 5/8
    = 5/13 xx (-3/8 – 5/8)
    = 5/13 xx (-1)
    = -5/13

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

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