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

Toán Lớp 5: Tính nhanh : 1981 – ( 249 + 981 )

Toán Lớp 5: Tính nhanh : 1981 – ( 249 + 981 )

Comments ( 2 )

  1. 1981 – ( 249 + 981 )
    =1981 – 249 – 981
    =(1981 – 981) – 249
    =1000 – 249
    = 751
     

  2. 1981 – (249 + 981)
    = 1981 – 249 – 981
    = (1981 – 981) – 249
    = 1000 – 249
    = 751

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