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: $\frac{2}{8×10}$ + $\frac{2}{10×12}$ +-..+$\frac{2}{142×144}$

Tháng Sáu 25, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: $\frac{2}{8×10}$ + $\frac{2}{10×12}$ +……+$\frac{2}{142×144}$

Comments ( 2 )

  1. hoquyly
    hoquyly
    25 Tháng Sáu, 2022 at 1:27 sáng
    Reply
    2/(8xx10) + 2/(10xx12) + … + 2/(142xx144)
    = 1/8 – 1/10 + 1/10 – 1/12 + … + 1/142 – 1/144
    = 1/8 – 1/144
    = 17/144

  2. myngocla
    myngocla
    25 Tháng Sáu, 2022 at 1:27 sáng
    Reply
    2/( 8 xx 10 ) + 2/( 10 xx 12 ) + …. + 2/( 142 xx 144 )
    = 1/8 – 1/10 + 1/10 – 1/12 + …. + 1/142 – 1/144
    = 1/8 – 1/144   
    = 18/144 – 1/144
    = 17/144

Leave a reply

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

Khánh Ly

About Khánh Ly