The correct answer is: $0.5\text{ kg}$
Explanation
To convert grams to kilograms you use the fact that $1\text{ kg} = 1000\text{ g}$. That means you divide the number of grams by 1000 to get kilograms.
Steps:
- Write the relationship: $$1\text{ kg} = 1000\text{ g}$$
- Set up the conversion formula: $$\text{kg} = \frac{\text{g}}{1000}$$
- Plug in 500 grams: $$\text{kg} = \frac{500\text{ g}}{1000} = 0.5\text{ kg}$$
Therefore, $500\text{ g} = 0.5\text{ kg}$.
Additional tips:
- Quick mental method: move the decimal point three places left (500 → 0.500 → 0.5).
- To check your work, convert back: $$0.5\text{ kg}\times 1000 = 500\text{ g}$$
- General rules: divide grams by 1000 to get kilograms; multiply kilograms by 1000 to get grams.