Common Core Math Vocabulary

Decimal - Definition with Examples

What is a Decimal?

Decimal Definition: A decimal number consists of a dot called decimal point. The decimal point separates the whole number part and the fractional part in a decimal number. The value of a digit according to the place of the digit in a number is known as the place value of that digit.

Decimal Parts

The decimal number system is based on the preceding powers of 10. As we move from the left to the right the place value of the digits gets divided by 10.

Decimal Number System

 

Decimal in Words and Expanded Form

Decimal in Expanded Form

 

Decimal Numbers on a Number Line

Tenths, hundredths, and thousandths can be represented on a number line. To represent tenths, the distance between each whole number on a number line is partitioned into 10 equal parts where each part represents a tenth.

Decimal on Number Line

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