......................?

mik ko biết

mong bn thông cảm 

nha ................

7/12 = 1/3 + 1/4

5/6=1/6+2/3

\(\frac{5}{6}=\frac{1}{6}+\frac{4}{6}=\frac{1}{6}+\frac{2}{3}\) hoặc \(\frac{5}{6}=\frac{2}{6}+\frac{3}{6}=\frac{1}{3}+\frac{1}{2}\)

 \(\frac{7}{12}=\frac{1}{12}+\frac{6}{12}=\frac{1}{12}+\frac{1}{2}\) hoặc \(\frac{7}{12}=\frac{3}{12}+\frac{4}{12}=\frac{1}{4}+\frac{1}{3}\).......

7/12

=4/12+3/12

=1/4+1/3

5/6

=3/6+2/6

=1/3+1/2

5/6=1/2+1/3

7/12=1/3+1/4

7/12=1/3+1/4

10/21=1/3+1/7

đúng ko

A. Gọi 5/12 = A/12 + B/12

Mà 5 = 1+4 => 5/12 = 1/12 + 4/12 

=> 5/12 = 1/12 + 1/3

B. 8/9 = 8x6/9x6 => 8/9 = 48/54

48/54 = 3/54 +18/54 + 27/54

=> 48/54= 1/18 + 1/3 + 1/2

Vì vậy 8/9 = 1/18 + 1/3 + 1/2

Dạ thầy cô hướng dẫn chị tiết giúp e với ạ?

\(\dfrac{7}{12}=\dfrac{3}{12}+\dfrac{4}{12}=\dfrac{1}{4}+\dfrac{1}{3}\)

\(\dfrac{13}{27}=\dfrac{9}{27}+\dfrac{4}{27}=\dfrac{1}{3}+\dfrac{4}{27}\)

\(\dfrac{7}{12}\) = \(\dfrac{1+6}{12}\) = \(\dfrac{1}{12}\) + \(\dfrac{6}{12}\) = \(\dfrac{1}{12}\) + \(\dfrac{1}{2}\)

\(\dfrac{7}{12}\) = \(\dfrac{3+4}{12}\) = \(\dfrac{3}{12}\) + \(\dfrac{4}{12}\) = \(\dfrac{1}{4}\) + \(\dfrac{1}{3}\)

\(\dfrac{13}{27}\) = \(\dfrac{1+12}{27}\) = \(\dfrac{1}{27}\) + \(\dfrac{12}{27}\) = \(\dfrac{1}{27}\) + \(\dfrac{4}{9}\)

\(\dfrac{13}{27}\) = \(\dfrac{4+9}{27}\) = \(\dfrac{4}{27}\) + \(\dfrac{9}{27}\) = \(\dfrac{4}{27}\) + \(\dfrac{1}{3}\)

\(\dfrac{13}{27}\) = \(\dfrac{6+7}{27}\) = \(\dfrac{6}{27}\) + \(\dfrac{7}{27}\) = \(\dfrac{2}{9}\) +  \(\dfrac{7}{27}\)

Ta có:\(\frac{7}{16}=\frac{3}{16}+\frac{4}{16}=\frac{3}{16}+\frac{1}{4}\)

Vậy Phân số \(\frac{7}{16}\)= \(\frac{3}{16}+\frac{1}{4}\)

7/16=2/16+5/16=1/8+5/16

7/16=4/16+3/16=1/4+3/16