Question: In the calculation 100.0 - 0.045, how many decimal places should the answer have?
Options:
0
1
2
3
Correct Answer: 0
Solution:
The number 100.0 has 1 decimal place, so the answer should also be rounded to 1 decimal place.
In the calculation 100.0 - 0.045, how many decimal places should the answer have
Practice Questions
Q1
In the calculation 100.0 - 0.045, how many decimal places should the answer have?
0
1
2
3
Questions & Step-by-Step Solutions
In the calculation 100.0 - 0.045, how many decimal places should the answer have?
Step 1: Look at the first number, which is 100.0. Count how many digits are after the decimal point. There is 1 digit (the '0').
Step 2: Now look at the second number, which is 0.045. Count how many digits are after the decimal point. There are 3 digits (the '0', '4', and '5').
Step 3: When you subtract numbers, the answer should have the same number of decimal places as the number with the fewest decimal places.
Step 4: Since 100.0 has 1 decimal place and 0.045 has 3 decimal places, we use the smaller number of decimal places, which is 1.
Step 5: Therefore, the answer to the calculation 100.0 - 0.045 should be rounded to 1 decimal place.
Significant Figures – Understanding how to determine the number of decimal places in a result based on the precision of the numbers involved in the calculation.
Rounding Rules – Applying rounding rules correctly to ensure the final answer reflects the appropriate level of precision.
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