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

Toán Lớp 6: 24 . ( – 15 ) +( – 15 ) . 75 – 15

Toán Lớp 6: 24 . ( – 15 ) +( – 15 ) . 75 – 15

Comments ( 2 )

  1. $24×(-15)+(-15)×75-15$
    =-360+-1125-15
    =-1500
    => Nhân chia trước, cộng từ sau

  2.     24 . ( – 15 ) +( – 15 ) . 75 – 15
    = 24 . ( – 15 ) +( – 15 ) . 75 + ( – 15 )
    = (-15) . ( 24 + 75 + 1 )
    = (-15) . 100
    = -1500
     

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