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Math Lesson 2.1.3 - Rounding to the Nearest Hundred
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Welcome to our Math lesson on Rounding to the Nearest Hundred, this is the third lesson of our suite of math lessons covering the topic of Rounding and Significant Figures, you can find links to the other lessons within this tutorial and access additional Math learning resources below this lesson.
Rounding to the Nearest Hundred
When rounding to the nearest hundred, the number will have at least two zeroes at the end after being rounded to the nearest hundred. We have to check the value of tens to know whether the number must be rounded up or down. The same rules are applied, i.e. when the tens digit ends with 0, 1, 2, 3 and 4, the number is rounded down to the nearest hundred, so its value decreases. On the other hand, if the value of tens digit is 5, 6, 7, 8 and 9, the number increases as it takes the value of the upper nearest hundred. In this case, the value of units' digit is not important; it will become zero in any case. The number rounded to the nearest hundred has at least two zeroes at the end. Lets's look at a couple of examples:
For example, 49 becomes 0 when rounded to the nearest hundred because the value of tens is 4, while 50 becomes 100 as the value of tens is 5. On the other hand, 149 also becomes 100 when rounded to the nearest hundred.
The number rounded to the nearest hundred has at least two zeroes at the end. However, there are some cases where the new number contains three zeroes at the end after being rounded to the nearest 100. This occurs when the number to be rounded is close to thousands. For example, 978 ≈ 1,000; 2017 ≈ 2000; etc.
More Rounding and Significant Figures Lessons and Learning Resources
Whats next?
Enjoy the "Rounding to the Nearest Hundred" math lesson? People who liked the "Rounding and Significant Figures lesson found the following resources useful:
- Nearest Hundred Feedback. Helps other - Leave a rating for this nearest hundred (see below)
- Approximations Math tutorial: Rounding and Significant Figures. Read the Rounding and Significant Figures math tutorial and build your math knowledge of Approximations
- Approximations Video tutorial: Rounding and Significant Figures. Watch or listen to the Rounding and Significant Figures video tutorial, a useful way to help you revise when travelling to and from school/college
- Approximations Revision Notes: Rounding and Significant Figures. Print the notes so you can revise the key points covered in the math tutorial for Rounding and Significant Figures
- Approximations Practice Questions: Rounding and Significant Figures. Test and improve your knowledge of Rounding and Significant Figures with example questins and answers
- Check your calculations for Approximations questions with our excellent Approximations calculators which contain full equations and calculations clearly displayed line by line. See the Approximations Calculators by iCalculator™ below.
- Continuing learning approximations - read our next math tutorial: Upper and Lower Bounds. Intervals and Segments
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