$\text{7km 47m=...km}$
$\text{=7+0,047km}$
$\text{=7,047km}$
$\text{Vậy 7km 47m=7,047km}$
--------------------------------------
$\text{46dm=...m...dm}$
$\text{=4m+6dm}$
$\text{Vậy 46dm=4m 6dm}$
-------------------------------------
$\text{29m 34cm=...cm}$
$\text{=2900cm+34cm}$
$\text{=2934cm}$
$\text{Vậy 29m 34cm=2934 cm}$
---------------------------------------
$\text{1372cm=...m...cm}$
$\text{=13m+72cm}$
$\text{Vậy 1372cm=13m+72cm}$
------------------------------------
$\text{1cm3mm=...mm}$
$\text{=10mm+3mm}$
$\text{=13mm}$
$\text{Vậy 1cm3mm=13mm}$
--------------------------------------
$\text{4037m=...km...m}$
$\text{=4km+37m}$
$\text{Vậy 4037m=4km 37m}$