\(\frac{-3}{-6}\)=\(\frac{12}{24}\)va \(\frac{-6}{-3}\)=\(\frac{24}{12}\)

\(\frac{12}{-3}\)=\(\frac{24}{-6}\)va\(\frac{-3}{12}\)=\(\frac{-6}{24}\)

3/6

12/24

24/48

3737/9999=37/99 vì lấy 2 số này chia 101

mk14+MGL=

a)\(\frac{2}{9}=\frac{8}{36}\)

b) \(\frac{-3}{-12}=\frac{-6}{-24}=\frac{-12}{-48}=\frac{1}{4}\)

Lời giải:

$\frac{3}{6}=\frac{2}{4}$

$\frac{6}{3}=\frac{4}{2}$

$\frac{3}{2}=\frac{6}{4}$

$\frac{2}{3}=\frac{4}{6}$

Các cặp phân số bằng nhau từ đẳng thức \(3\times4=6\times2\) là:

\(\dfrac{3}{6}=\dfrac{2}{4};\)   \(\dfrac{4}{6}=\dfrac{2}{3};\)   \(\dfrac{6}{3}=\dfrac{2}{4};\)   \(\dfrac{6}{4}=\dfrac{3}{2}\)

\(2.24=6.8\Rightarrow\frac{2}{8}=\frac{6}{24}\Rightarrow\frac{6}{2}=\frac{24}{8}\)

b,\(\frac{-3}{9}=\frac{4}{-12}\Rightarrow\frac{9}{-3}=\frac{-12}{4}\)

a, 2 x 24 =6 x 8

\(\Rightarrow\)\(\frac{2}{6}=\frac{8}{24}\);\(\frac{2}{8}=\frac{6}{24}\);\(\frac{6}{2}=\frac{24}{8}\);\(\frac{8}{2}=\frac{24}{6}\).

b, (-3) x (-12) =4 x 9

\(\Rightarrow\)\(\frac{-3}{4}=\frac{9}{-12}\);\(\frac{-3}{9}=\frac{4}{-12}\);\(\frac{4}{-3}=\frac{-12}{9}\);\(\frac{9}{-3}=\frac{-12}{4}\)

Chuc ban hic tot nha!