Convert into $\mathrm{grams}$.
$2250 \mathrm{mg}$

Convert into $\mathrm{grams}$.

$5 \mathrm{kg} 400 \mathrm{g}$

Write the answer in grams.

$4000$ gram

Write the answer in kilograms.

Convert into $\mathrm{kilogram}$.

$7350 \mathrm{gram}$

Convert into $\mathrm{kilogram}$.

$4750 \mathrm{gram}$

Find the sum:
$5 \mathrm{kg} 300 \mathrm{g} +19 \mathrm{kg} 850 \mathrm{g}$

Write the answer in $\mathrm{\_\_} \mathrm{kg} \mathrm{\_\_} \mathrm{g}$.

Add the following and write the answer in the form $x \mathrm{g} y \mathrm{mg}$.

$15 \mathrm{g} 450 \mathrm{mg} +14 \mathrm{g} 25 \mathrm{mg} +3 \mathrm{g} 700 \mathrm{mg}$

Add the following and write the answer in the form $x \mathrm{kg} y \mathrm{g}$.

$18 \mathrm{kg} 750 \mathrm{g} +16 \mathrm{kg} 400 \mathrm{g} +3 \mathrm{kg} 500 \mathrm{g}$

If $75 \mathrm{kg} -35 \mathrm{kg} 400 \mathrm{g}=x \mathrm{kg} y \mathrm{g}$, then write the value of $x$ in the answer box.