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.

If $57 \mathrm{kg} 750 \mathrm{g} -23 \mathrm{kg} 450 \mathrm{g}=x \mathrm{kg} y \mathrm{g}$, then write the value of $x$ in the answer box.

If $975 \mathrm{kg} 400 \mathrm{g} -755 \mathrm{kg} 550 \mathrm{g}=x \mathrm{kg} y \mathrm{g}$, then write the value of $y$ in the answer box.

Multiply: $7 \mathrm{kg} 350 \mathrm{g} \mathrm{x} 7$

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

Multiply: $9 \mathrm{kg} 750 \mathrm{g} \mathrm{x} 3$

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