- 4.1 a -
The student will read, write, and identify the place and value of each digit in a nine-digit whole number. 

Understanding the Standard:

  • Place value refers to the value of each digit and depends upon the position of the digit in the number. For example, in the number 7,864,352, the 8 is in the hundred thousands place, and the value of the 8 is eight hundred thousand or 800,000.
  • Whole numbers may be written in a variety of forms:
    • Standard: 1,234,567
    • Written: one million, two hundred thirty-four thousand, five hundred sixty-seven
    • Expanded: (1,000,000 + 200,000 + 30,000 + 4,000 + 500 + 60 + 7) 
  • Numbers are arranged into groups of three places called periods (ones or units, thousands, millions). The value of the places within the periods repeat (hundreds, tens, ones). Commas are used to separate the periods. Knowing the value of the place and period of a number helps us determine values of digits in any number as well as read and write numbers. In fourth grade, we will work with numbers through the millions period (nine-digit numbers).

PRACTICE ITEMS