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

Toán Lớp 6: (21/31+2013)-(44/53-10/31)-9/53 Giúp e vs ạ

Toán Lớp 6: (21/31+2013)-(44/53-10/31)-9/53
Giúp e vs ạ

Comments ( 2 )

  1. Mở ngoặc ta có:
    21/31+2013-44/53+10/31-9/53
    Ghép lại ta có:
    =>(21/31+10/31)+(-44/53-9/53)+2013
    =>31/31-53/53+2013
    =>1-1+2013
    =>2013
     

  2. ( 21/31 + 2013) – ( 44/53 – 10/31) – 9/53
    = 21/31 + 2013 – 44/53 + 10/31 – 9/53
    = ( 21/31 + 10/31) – ( 44/53 + 9/53) + 2013
    = 1 – 1 + 2013
    = 2013

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