Chapter 1: Use Place Value to Represent Whole Numbers
During this chapter, students learn to:
- Read and write whole numbers through the millions.
- Compare and order whole numbers through the millions.
- Round whole numbers through the millions.
Chapter 1 Vocabulary:
digit: A symbol used to write numbers. The ten digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
estimate: A number close to an exact value; an estimate indicates about how much. Example: 47+22 (estimate 50 + 20) about 70
expanded form: The representation of a number as a sum that shows the value of each digit. Example: 536 could be written as 500 + 30 + 6.
is equal to (=): Having the same value.
is greater than (>): The number on the left of the symbol is greater than the number on the right. Example: 5 > 3 (5 is greater than 3.)
is less than (<): The number on the left of the symbol is less than the number on the right. Example: 4 < 7 (4 is less than 7.)
place value: The value given to a digit by its position in a number.
rounding (or round): To find the nearest value of a number based on a given place value. To change the value of a number to one that is easier to work with.
standard form: The usual way of writing a number that shows only its digits, no words.