Place Value Flashcards
Place value
The value given to a digit by its position in a number.
Period
Each group of three digits on a place-value chart.
Standard form
The usual or common way to write a number using digits.
Decimal
A number that has a digit in the tenths place, hundredths place, and beyond.
Expanded form
A way to write numbers by adding the value of its digits.
Word form
Writing a number in words.
Equivalent decimals
Decimals that have the same value
Sum
The total amount of addition resulting from the addition of two numbers.
Difference
A difference is the result of a subtraction problem. View our Lesson on Subtracting Decimals.
Estimate
To estimate means to find something close to the correct answer.
Inverse operations
Operations that can undo each other
Rounding
Rounding means making a number simpler but keeping its value close to what it was
