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### Course: 4th grade (2018 edition)>Unit 8

Lesson 1: Intro to place value

# Finding place value

Sal finds the place value of 3 in 4356. Created by Sal Khan and Monterey Institute for Technology and Education.

## Want to join the conversation?

• what do place-value's mean.
(1 vote)
• Hey Keairah!

Place values are the numerical value that a digit has by virtue of its position in a number.

Hope this helps!
• Why do we use negative numbers?
• at he gives the answer :)
• This might sound like a dumb question, but why couldn't you say four thousand three hundred and fifty-six instead of without the "and"? In theory, they mean the same thing - but I guess you could somehow interpret it as 4300 and 56 (two separate numbers). Is there a "more correct" way to say it?
• When you say AND then that means that any number after that is on the right of the decimal point. My dad taught me that.
• What grade is pre algebra for?
• Pre-algebra is a common name for a course in middle school mathematics. In the United States, pre-algebra is usually taught in the 8th grade. The objective of it is to prepare students for the study of algebra.
• why do we use this strategy it is more complicated and all so why😅
• Does negative numbers has place value??
• Negative numbers use the same place values as positive numbers. The numbers are just on the other side of 0 on a number line. The values are just negative.
If you are familiar with expanded form:
27 = 20+7
-27 = -20+(-7)
In both cases we have tens place and ones place.
Hope this helps.
• So count after the decimal.....so if its to two decimal places...count two numbers after the decimal point now the next number the third number will determine what you will round that 2nd number to. So 4.8735 to Two decimal places is like.... this count 8 and the 7 that's two decimal places....now look at the next number its less than 5 so we are going to round to 4.97? PM
• Why would you change the 8 to a 9? Underline the place value you are rounding to, then see if it stays a 7 or moves to an 8, so correct answer is 4.87. Rounding to one place, underline the 8 and the 7 causes it to move to a 9, so answer would be 4.9. You had it right in your other post.
• You just take away the point from the decimal then add it all together. When your done just add back the decimal.

EX.

1) 12.3
24.4
__+

2) 123
244
__+

3) 123
244
__
+
• Yes. In fact machines have been computing more and more digits of `pi`. They actually found the first `105 trillion` digits since March 14, 2024! Woah!