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

Toán Lớp 5: e 1995 x 1997 – 1 / 1996 x 1995 + 1994

Toán Lớp 5: e 1995 x 1997 – 1 / 1996 x 1995 + 1994

Comments ( 2 )

  1. e) ( 1995 xx 1997 – 1)/( 1996 xx 1995 + 1994)
    = ( 1995 xx ( 1996 + 1) – 1)/(1996 xx 1995 + 1994)
    = ( 1995 xx 1996 + 1995 xx 1 – 1)/( 1996 xx 1995 + 1994)
    = ( 1995 xx 1996 + 1995 – 1)/( 1996 xx 1995 + 1994)
    = ( 1995 xx 1996 + 1994)/( 1996 xx 1995 + 1994)
    => = 1

  2. (1995 xx 1997 – 1)/(1996 xx 1995 + 1994)
    =(1995xx(1996+1)-1)/(1996xx1995+1994)
    =(1995xx1996+1995xx1-1)/(1996xx1995+1994)
    =(1995xx1996+1994)/(1996xx1995+1994)
    =1
     

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