Question

    hãy lập các cặp phân số bằng nhau bằng đẳng thức

a/3.4=6.2

b/(-7).6=(-21).2

c/6.(-3)=9.(-2)

d/(-5).6=10.(-3)

Answer 1

a) 3 . 4 = 6 . 2

\(\Rightarrow\frac{3}{6}=\frac{2}{4}\)

\(\frac{6}{3}=\frac{4}{2}\)

\(\frac{3}{2}=\frac{6}{4}\)

\(\frac{2}{3}=\frac{4}{6}\)

Answer 2

a, \(3.4=6.2\)

\(\Leftrightarrow\frac{3}{6}=\frac{2}{4};\frac{3}{2}=\frac{6}{4};\frac{4}{6}=\frac{2}{3};\frac{4}{2}=\frac{6}{3};...\)

P/s: Các câu còn lại tương tự :) 

Answer 3

b) -7 . 6 = -21 . 2

\(\Rightarrow\frac{-7}{-21}=\frac{2}{6}\)

\(\frac{-21}{-7}=\frac{6}{2}\)

\(\frac{-7}{2}=\frac{-21}{6}\)

\(\frac{2}{-7}=\frac{6}{-21}\)

Answer 4

c) 6. (-3) = 9. (-2)

\(\Rightarrow\frac{6}{9}=\frac{-2}{-3}\)

\(\frac{9}{6}=\frac{-3}{-2}\)

\(\frac{6}{-2}=\frac{9}{-3}\)

\(\frac{-2}{6}=\frac{-3}{9}\)

Answer 5

d) -5.6 = 10.(-3)

\(\Rightarrow\frac{-5}{10}=\frac{-3}{6}\)

\(\frac{10}{-5}=\frac{6}{-3}\)

\(\frac{-5}{-3}=\frac{10}{6}\)

\(\frac{-3}{-5}=\frac{6}{10}\)

Answer 6

3.4 = 6.2

=> 3/6 = 2/4

=> 6/3 = 4/2

=> 3/2 = 6/4

=> 2/3 = 4/6