Question

Answer 1

\(\dfrac{9}{20}=\dfrac{9.5}{20.5}=\dfrac{45}{100}\)

\(\dfrac{133}{40}=\dfrac{133.25}{40.25}=\dfrac{3325}{1000}\)

Answer 2

\(\dfrac{9}{20}=\dfrac{9\cdot5}{20\cdot5}=\dfrac{45}{100}\)

\(\dfrac{133}{40}=\dfrac{133\cdot25}{40\cdot25}=\dfrac{3325}{1000}\)

Answer 3

Lời giải:

$\frac{9}{20}=\frac{9\times 5}{20\times 5}=\frac{45}{100}$

$\frac{133}{40}=\frac{133\times 25}{40\times 25}=\frac{3325}{1000}$

Answer 4

\(\dfrac{9}{20}=\dfrac{9.5}{20.5}=\dfrac{45}{100}\)

\(\dfrac{133}{40}=\dfrac{133.25}{40.25}=\dfrac{3325}{1000}\)