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Tính 5/9+7/12-3/4

Hoàn thành các phép tính sau

\(\dfrac{5}{9}\)+\(\dfrac{7}{12}\)-\(\dfrac{3}{4}\)=\(\dfrac{5.4}{36}\)+\(\dfrac{7.?}{36}\)-\(\dfrac{3.?}{36}\)

=\(\dfrac{20+?-?}{36}\)

=\(\dfrac{14}{36}\)=\(\dfrac{?}{?}\)

Theo dõi Vi phạm
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Trả lời (2)

 
 
 
  • \(\dfrac{5}{9}+\dfrac{7}{12}-\dfrac{3}{4}=\dfrac{5.4}{36}+\dfrac{7.3}{36}-\dfrac{3.9}{36}\\ =\dfrac{20+21-27}{36}\\ =\dfrac{14}{36}=\dfrac{7}{18}\)

      bởi Nguyễn Thị Ngọc Vân 15/12/2018
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    15/12/2018 |   1 Trả lời

  • Bài I.2 - Bài tập bổ sung (Sách bài tập - tập 1 - trang 35)

    ƯCLN của ba số 96, 160, 192 bằng :

    (A) 16                      (B) 24                       (C) 32                     (D) 48

    Hãy chọn phương án đúng ?

    15/12/2018 |   4 Trả lời

  • Một cửa hàng mua vào 1 kg đường với giá 6000 đồng. Hỏi cửa hàng phải bán lại bao nhiêu tiền 1 kg đường để được lời 20 % theo giá bán?

    15/12/2018 |   1 Trả lời

  • so sánh 31^111va 17^139

    15/12/2018 |   1 Trả lời

  • 3+2^x-1=24-[4^2-(2^2-1)]

    15/12/2018 |   4 Trả lời

  • Giúp mình với ai nhanh thì được tick

    Tìm 3 số nguyên a,b,c biết : a+b-c=-3,a-b+c=11,a-b-c=-1

    Giúp mình nhanh nhất có thể khocroi

    15/12/2018 |   1 Trả lời

 

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