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

Toán Lớp 4: a) X- 67421 = 56789 b) X – 2003 = 2004 + 2005.

Toán Lớp 4: a) X- 67421 = 56789 b) X – 2003 = 2004 + 2005.

Comments ( 2 )

  1. a) x-67421=56789
        x=56789+67421
        x=124210
    Vậy x=124210
    b) x-2003=2004+2005
        x-2003=4009
        x=4009+2003
        x=6012
    Vậy x=6012
     

  2. a) $ x – 67421 = 56789 $
    $⇒ x = 56789 + 67421 $
    $ ⇒ x = 124210 $
    Vậy  $ x = 124210 $ 
    b) $ x – 2003 = 2004 + 2005 $
    $ ⇒ x = 2004 + 2005 + 2003 $
    $ ⇒ x = 6012 $
    Vậy $ x = 6012 $
                
     

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