Reducing the digits in a number while keeping the value similar

The value of where the digit is in the number, such as units, tens, hundreds, etc.

A symbol used to make numerals.

A close guess of the actual value, usually with some thought or calculation involved.

Using the digit in a given place value for the value of an entire number

numbers that are close in value to the actual numbers, and which make it easy to do mental arithmetic.

numbers that are close in value to the actual numbers, and which make it easy to do mental arithmetic.

A close guess of the actual value, usually with some thought or calculation involved.

What the commas represent in over 3 digit numbers

If writing the number 230,945 in expanded form, what should you do to the thousands place?

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