Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 7: (-1/2) + (-1/9) -(-3/5)+1/2006 – (-2/7) – 7/18 + 4/35

Toán Lớp 7: (-1/2) + (-1/9) -(-3/5)+1/2006 – (-2/7) – 7/18 + 4/35

Comments ( 2 )

  1. (-1/2)+(-1/9)-(-3/5)+1/(2006)-(-2/7)-7/(18)+4/(35))
    =-1/2-1/9+3/5+1/(2006)+2/7-7/(18)+4/(35)
    =(-1/2-1/9-7/(18))+(3/5+2/7+4/(35))+1/(2006)
    =-1+1+1/(2006)
    =1/(2006)

  2. ( – 1/2 ) + ( – 1/9 ) – ( – 3/5 ) + 1/2006 – ( – 2/7 ) – 7/18 + 4/35
    = ( – 1/2 ) – 1/9 + 3/5 + 1/2006 + 2/7 – 7/18 + 4/35
    = [ ( – 1/2 ) – 1/9 – 7/18 ] + [ 3/5 + 2/7 + 4/35 ] + 1/2006
    = [ ( – 9/18 ) – 2/18 – 7/18 ] + [ 21/35 + 10/35 + 4/35 ] + 1/2006
    = [ ( – 11 )/18 – 7/18 ] + [ 31/35 + 4/35 ] + 1/2006
    = ( – 1 ) + 1 + 1/2006
    = 0 + 1/2006
    = 1/2006

Leave a reply

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