Concepts – Place Value

In our decimal number system, the value of a digit depends on its place, or position in the number. Each place has a value of 10 times the place to its right.

Rules

Read the number from left to right.

In reading, writing and comparing large numbers, group place values into periods ‘ones’, ‘tens’, ‘hundred’, ‘thousand’, ‘10 thousand’, ‘100 thousand’, ‘million’, ’10 million’, ‘100 million’, ‘billion’, ’10 billion’, ‘100 billion’, ‘trillion’, etc.

Every 3 periods are separated by a comma.

Example

Choose the correct number for:

Eight hundred eighty-nine million four hundred eleven thousand three hundred eighty-two.

Solution

Use a place value chart to find the answer. 

Write the numbers in the chart as it is read left to right. 

The answer is 889,411,382.

Prerequisite Skills

Value of Digit - Up to Ten Thousands (3.1.9)

Write Numbers for Word Names - Up to Ten Thousands (3.1.10)

Write Word Names for Numbers - Up to Ten Thousands (3.1.11)

Value of Digits (5.1.1)

Value of Digit  - Up to Millions (4.1.8)

Write Word Names for Numbers  - Up to Millions (4.1.6)

Write Numbers for Word Names - Up to Millions (4.1.5)