Place Value and Rounding Numbers
Learn how place value shows the value of each digit in a number, and how to round numbers accurately. Let’s get started! 🚀
Video Lesson
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Flashcards
Review key concepts visually
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🛎️ What is a Place Value Chart?
- A place value chart shows the value of each digit in a number.
- For example, the digit 2 means 20 in tens but 200 in hundreds.
🛎️ The Base 10 Number System
- The base 10 system uses the digits 0-9 to make all numbers.
- Moving a digit left makes the value 10 times bigger (5 → 50 → 500).
🛎️ How to Round a Number?
- Find the target place you are rounding to, then look at the digit to the right.
- If the digit is 5 or more, round up; if it is 4 or less, round down.
🛎️ What Does Rounding Down Mean?
- When rounding down, the target digit stays the same and the rest become zeros.
- For example, 342 rounded to the nearest 10 becomes 340.
🛎️ What Does Rounding Up Mean?
- When rounding up, the target digit increases by 1 and the rest become zeros.
- For example, 685 rounded to the nearest 10 becomes 690.
Practice Questions
Test your understanding
What is the place value of the digit 3 in the number 3452?
Correct! 🎉 +10 pointsNot quite right
In the number 3452, the digit 3 is in the thousands place, representing 3000.
Round 4367 to the nearest hundred.
Correct! 🎉 +10 pointsNot quite right
To round to the nearest hundred, check the tens digit (6). Since it is 5 or more, round the hundreds digit up to get 4400.
In the number 27891, what is the value of the digit 8?
Correct! 🎉 +20 pointsNot quite right
In 27891, the digit 8 is in the hundreds place, so its value is 800.
Round 8946 to the nearest thousand.
Correct! 🎉 +20 pointsNot quite right
To round to the nearest thousand, check the hundreds digit (9). Since it is 5 or more, round up to 9000.
Which digit do you check to round 76349 to the nearest hundred?
Correct! 🎉 +20 pointsNot quite right
To round to the nearest hundred, you check the tens digit, which is 4.
Round 135289 to the nearest ten thousand.
Correct! 🎉 +30 pointsNot quite right
To round to the nearest ten thousand, check the thousands digit (5). Since it is 5 or more, round up to 140000.
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