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### Course: Arithmetic>Unit 5

Lesson 5: How 10 relates to place value

# Understanding place value

Sal discusses how a digit in one place represents ten times what it represents in the place to its right. Created by Sal Khan.

## Want to join the conversation?

• I don't understand the question which involve LEFT.
someone here to assist me.
• hey imagin theres 1 arrow going left and another one facing right and there a number like this one here 450 add that number with this one here 390 add them from right to left bc the anwser is gonno be 840
• Im struggling with understanding place value and place value multiplying and dividing by 10
• Let's say you have a number 0001.0000 (the zeroes before and after the one don't hold any value) if you were to multiply this number by 10 you would move the decimal to the right once so the new number would be 00010.00 multiply it by 10 again and you get 000100.0
• how do you know it could be ten times the value even if
you can times by any number.
• So the 25430 can be more than 2543 although they're almost the same numbers?
• Yes, 25430 will always be more, Cause they have a number in a high place value, and the other number doesnt have a number in that place value,

5 numbers > 4 numbers
The additional 0 makes it more
• Why wasn't the second 7 100 times less than the first?
To get from 70,000 to 700,000 you must multiply that by 100 to get 700,00. SO why is it 10 and not 100?
• What is the place value of '0' in this number 60942
• It is the thousands place, and the number would be written like this: 60,942.
• Why can a number like 221,300 become a smaller number when divided by ten?