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Course: MAP Recommended Practice>Unit 34

Lesson 7: Rounding decimals

Worked example: Rounding decimals to nearest tenth

Rounding decimals to the nearest tenth can be fun. We can identify the tenths place in the given decimal, 9.564. Then we can look at the digit to the right of the tenths place to determine whether to round up or down. In this case, the answer is to round up to 9.6. Created by Sal Khan and Monterey Institute for Technology and Education.

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• why isn't there a twentyeths place??
• That's because decimals are base ten.
• hello.... I have couple of questions 1. You round to one place lower so in thousenths place u round up to place next like .5634 so we round to .563 4 is not considered ? 2. In number lines how do u round like how u write the digits is it like .1 to .9 ? 3. I'm having problems with rounding up in thousenths place mostly

thank you
• Hello! Hopefully the following answer addresses your 1st and 3rd questions. Unfortunately, I'm not quite sure what you mean by "In number lines how do you round like how you write the digits". Number lines can start and end at any number and have markers at any set distance (1, 0.5, 0.1, etc.). If you can rephrase the question, maybe I can help!

The digits to the right of the decimal point are the *tenths* place, hundredths place, thousandths place, and ten-thousandths place (remember there's no "onethes" place!). In 0.5634, the 3 is in the thousandths place. When you round to the nearest thousandth, you meant that you want to end up with 0.56#, where you have to figure out what should go in the # place. You figure that out by considering the 4 in the ten-thousandths place.
If you had 34 and wanted to round to the nearest tens place, you'd say "4 is less than 5, so I'll round down" and end up with 30. The same applies here: 4 is less than 5, so you round down, and end up with 0.563. Considering the 4 is how you get 0.563 instead of 0.564!
• HI guys! What does the video mean by rounding decimals? why do we have to do that?

-Abi

PS: I am 11! And am pretty smart but this does not make sense!
• Well,the video tells us to round decimals because that's probably what the next exercise will be based on. Plus it will tell you, round A to the nearest thousandth.
• When you have a question for example;
1267.9876 Round to the nearest hundred.
It would = 1300, why do you have to get rid of the 6,7 and also the decimal points?
• Because 6 and 7 are larger than 4, so you must round them up. You get rid of the decimal points because 9,8,7 and 6 are all larger than 4. However, even if it was "round 1267.1234 to the next hundred, it would still be 1300. Why? Well, you must always look for the "decider". What is this? Well, the decider is the number that decides what the number you are rounding will be. For example, when rounding 1643 to the nearest hundred, the decider would be 40. If it was 1643 rounded to the nearest thousand, then the decider would be 600. If... well, you get the idea! :)
• after the decimal point does it start at oneth or tentes and how can you tell what place it it behind the decimal....
• Tenths. It goes by base tens.
• If I have 5.1897 and I'm rounding to the nearest thousandth what do I do? What does the 9 turn into and how is that effecting the rest of the numbers
• For your example, in this case 9 is in the thousandths place. To the right of 9 is 7, which is 5 or greater. Here, 9 becomes 0 and you add 1 to the 8 which becomes 9. Therefore, 5.1897 is rounded to 5.190.
(1 vote)
• is there such thing as rounding to the thousandths place? PLEASE HELP ME I WOULD REALLY LIKE THAT THANKS
• It's a thing if i'm rounding 92.3345 to the thousandths it will be 92.335.... im rounding up
• How do you round 9.5
• First, you need to know what value you're rounding to. For example, 9.5 could be rounded to the nearest one. So then, you need to find out if 9.5 rounds up or down. 1-4 rounds down, and 5-9 rounds up. 9.5 rounded to the nearest one will be 10! I hope this helped and you understand now.