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 4: (2012×86+2012×14)x(1+2+3+-..+9)x(45×12-9×66) tính nhanh

Toán Lớp 4: (2012×86+2012×14)x(1+2+3+……+9)x(45×12-9×66) tính nhanh

Comments ( 2 )

  1. (2012×86+2012×14)x(1+2+3+……+9)x(45×12-9×66)
    =[(2012x(86+14)]x{[(9-1):1+1]:2x(9+1)}x(9x5x12-9×66)
    =(2012×100)x(9:2×10)x[9x(66-5×12)]
    =201200x45x(9×6)
    =201200x45x72
    =201200×3240
    =651888000
    Xin hay nhất

  2. Giải đáp:
     (2012 x 86 + 2012 x 14)
    = 2012 x (86 + 14)
    = 2012 x 100
    =201200
     

Leave a reply

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