Place Value and Rounding Numbers
Learn how place value shows the value of each digit in a number, and how to round numbers accurately. Letβs get started! π
Video Lesson
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Flashcards
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ποΈ 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.
ποΈ 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 β 50 β 500).
ποΈ 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.
ποΈ 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.
ποΈ 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
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Interactive Activity
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