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: 3 2/14 + 5/27 + 2.5 – 2/14 + 22/27 1 1/14 : 5/7 + 2 1/14:(-5/7)

Tháng Tám 4, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: 3 2/14 + 5/27 + 2.5 – 2/14 + 22/27
1 1/14 : 5/7 + 2 1/14:(-5/7)

Comments ( 2 )

  1. dantam45
    dantam45
    4 Tháng Tám, 2022 at 2:14 sáng
    Reply
    3 2/14 + 5/27 + 2.5 -2/14 +22/27
    =44/14 + 5/27 + 10-2/14 +22/17
    =(44/14 – 2/14)+(5/27 + 22/17) +10
    =42/14 + 27/27 +10
    =3+1+10
    =4+10
    =14
    1 1/14 : 5/7 + 2 1/14 :(-5/7)
    =15/14 . 7/5 + 29/14 . -5/7
    =15/14 . 7/5 + 29/14 . 5/7.(-1)
    =5/7. [15/14 + 29/14. (-1)]
    =5/7 . [15/14 + (-29/14)]
    =5/7. -14/14
    =5/7 .(-1)
    =-5/7

  2. kymmailien
    kymmailien
    4 Tháng Tám, 2022 at 2:14 sáng
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
     $\dfrac{32}{14}+\dfrac{5}{27}+2.5-\dfrac{2}{14}+\dfrac{22}{27}$
    $=(\dfrac{32}{14}-\dfrac{2}{14})+(\dfrac{5}{27}+\dfrac{22}{27})+10$
    $=\dfrac{30}{14}+\dfrac{27}{27}+10$
    $=\dfrac{15}{7}+11$
    $=\dfrac{92}{7}$
    $\dfrac{11}{14}:\dfrac{5}{7}+\dfrac{21}{14}:\dfrac{5}{7}$
    $=(\dfrac{11}{14}+\dfrac{-21}{14}).\dfrac{5}{7}$
    $=\dfrac{-10}{14}.\dfrac{5}{7}$
    $=\dfrac{25}{49}$
    (Bài tham khảo)
    (Bài tham khảo)

Leave a reply

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

Linh

About Linh