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

Toán Lớp 6: (-29). (85 – 47) – 85. (47 – 29)

Toán Lớp 6: (-29). (85 – 47) – 85. (47 – 29)

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết :
    ( – 29 ) . ( 85 – 47 ) – 85 . ( 47 – 29 )
    = ( – 29 ) . 85 – 29 . ( – 47 ) – 85 . 47 – 85 . ( – 29 )
    = – 29 . 85 + 1363 – 3995 + 85 . 29
    = ( – 29 . 85 + 85 . 29 ) – 2632
    = 85 . ( – 29 + 29 ) – 2632
    = 85 . 0 – 2632
    = 0 – 2632
    = – 2632

  2. ( -29 ) . ( 85 – 47 ) – 85 . ( 47 – 29 )
    = -29 . 85 + 29 . 47 – 85 . 47 + 85 . 29
    = ( -29 . 85 + 85 . 29 ) + 29 . 47 – 85 . 47
    = 0 + 47 . ( 29 – 85 )
    = 47. ( -56 )
    = -2632

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

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