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: Tính bằng cách hợp lí : `1/4` x `3/5` x `1/6` + `1/3` x `2/7` x `1/8` + `1/2` x `24/35` x `1/12`

Toán Lớp 5: Tính bằng cách hợp lí :
1/4 x 3/5 x 1/6 + 1/3 x 2/7 x 1/8 + 1/2 x 24/35 x 1/12

Comments ( 2 )

  1. 1/4 xx 3/5 xx 1/6 + 1/3 xx 2/7 xx 1/8 + 1/2 xx 24/35 xx 1/12
    = ( 1/4 xx 1/6 ) xx 3/5 + ( 1/3 xx 1/8 ) xx 2/7 + ( 1/2 xx 1/12 ) xx 24/35
    = 1/24 xx 3/5 + 1/24 xx 2/7 + 1/24 xx 24/35
    = 1/24 xx ( 3/5 + 2/7 + 24/35 )
    = 1/24 xx 55/35
    =11/168
    #dtkc
     

  2. 1/4 . 3/5 . 1/6 + 1/3 . 2/7 . 1/8 + 1/2 . 24/35 . 1/12
    = 1/24 . 3/5 + 1/24 . 2/7 + 1/24 . 24/35
    = 1/24 . (3/5 + 2/7 + 24/35)
    = 1/24 . 11/7
    = 11/168
    Gửi bạn!
     

Leave a reply

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

About Lan Anh