Question

Phân số hoặc hỗn số?

21m 35 cm = ...................m                                7m 9dm = .......................m

3m 49mm = .....................m                                12km 45m = ...................m

Answer 1

\(21m35cm\)

\(=21+\dfrac{35}{100}\left(m\right)\)

\(=21+\dfrac{7}{20}\left(m\right)\)

\(=21\dfrac{7}{20}\left(m\right)\)

______

\(7m9dm\)

\(=7+\dfrac{9}{10}\left(m\right)\)

\(=7\dfrac{9}{10}\left(m\right)\)

____

\(3m49mm\)

\(=3+\dfrac{49}{1000}\left(m\right)\)

\(=3\dfrac{49}{1000}\left(m\right)\)

_____

\(12km45m\)

\(=12\cdot1000+45\left(m\right)\)

\(=12000+45\left(m\right)\)

\(=12045\left(m\right)\)