A newborn weighs 5640 g at birth, convert the newborn's weight to kg (round to the nearest tenth).
Understand the Problem
The question is asking to convert the weight of a newborn from grams to kilograms and to round the result to the nearest tenth.
Answer
For example, if the weight is 3500 grams, the answer is $3.5$ kg.
Answer for screen readers
The final answer will depend on the weight in grams provided. For a calculation example using 3500 grams, the answer is $3.5$ kg.
Steps to Solve
- Convert grams to kilograms To convert grams to kilograms, we divide the weight in grams by 1000 (since 1 kg = 1000 g).
Let’s assume the weight of the newborn is given as $x$ grams. The formula would be:
$$ \text{Weight in kg} = \frac{x}{1000} $$
- Round the result to the nearest tenth After converting the weight to kilograms, we need to round the result to the nearest tenth. This means we look at the first digit after the decimal point.
If the digit in the hundredths place (the second digit after the decimal) is 5 or more, we round up. If it's less than 5, we round down.
- Example Calculation For example, if the newborn weighs 3500 grams, we convert it:
$$ \text{Weight in kg} = \frac{3500}{1000} = 3.5 \text{ kg} $$
Since 3.5 is already rounded to the nearest tenth, our final answer remains 3.5 kg.
The final answer will depend on the weight in grams provided. For a calculation example using 3500 grams, the answer is $3.5$ kg.
More Information
Converting units is a common task in measurements. Knowing how to switch between grams and kilograms helps with understanding weight, especially in contexts like medication dosages or baby weights.
Tips
- Not dividing by 1000 to convert grams to kilograms. Always remember the conversion factor.
- Misplacing a decimal when rounding. Make sure to check the digit in the hundredths place carefully before rounding.
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