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 5: 1/3

Toán Lớp 5: 1/3

Comments ( 2 )

  1. 1/3<y/9<1/2
    => 18/54 < 6y/54 < 27/54
    => 18 < 6y < 27
    => 3 < y < 4,5
    Mà y là số tự nhiên => y = 4
    Vậy y = 4

  2. Answer
    $\text{Ta có:}$
    1/3 < y/9 < 1/2
    1/3 = {1xx6}/{3xx6} = 6/18
    y/9 = {y xx 2}/{9 xx 2} = {2y}/18
    1/2 = {1xx9}/{2xx9} = 9/18
    $\text{Vậy ta có:}$
    6 < 2y < 9
    $\text{Vậy ta có:}$
    2 xx 3 < 2 xx y <= 2 xx 4
    3 < y <= 4
    $\text{Vậy}$ y = 4

Leave a reply

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