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: (-2).(-38/21.-7/4.(-3/8) làm nhanh đi các bro

Toán Lớp 7: (-2).(-38/21.-7/4.(-3/8)
làm nhanh đi các bro

Comments ( 2 )

  1. (-2) . (-38/21) . (-7/4) .  (-3/8)
    = { (-2) . (-38) . (-7) . (-3)}/{21 . 4 . 8}
    = { (-1) . (-19) . (-21)}/{21 . 8}
    = {(-1) . (-19) . (-1)}/{8}
    = {-19}/8   

  2. Câu hỏi: (-2) . $\dfrac{-38}{21}$ . $\dfrac{-7}{4}$ . ($\dfrac {-3}{8}$)
    Trả lời: (-2) . $\dfrac{-38}{21}$ . $\dfrac{-7}{4}$ . ($\dfrac {-3}{8}$) = $\dfrac{2.38.7.3}{21.4.8}$ = $\dfrac{2.2.19.7.3}{3.7.2.2.8}$ = $\dfrac{19}{8}$ 

Leave a reply

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