Understanding Whole Numbers Lesson 1-1. Vocabulary standard form – a number is written using digits and place value (the regular way to write numbers).

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Presentation transcript:

Understanding Whole Numbers Lesson 1-1

Vocabulary standard form – a number is written using digits and place value (the regular way to write numbers). expanded form – a number is written as a sum using the place and value of each digit.

Place Value Chart

How To Read a Large Number Numbers are grouped in sets of three (each set is called a period). Only read three numbers at a time. Say the name of the period that the numbers are in. Say “and” for the decimal, but do not say “and” if there isn’t a decimal.

Example 4,658,089 Millions periodThousands periodOnes period Four million, six hundred fifty-eight thousand, eighty-nine.

Number Lines Numbers towards the right on a number line are larger. As you move to the left on a number line, the numbers get smaller. What’s Bigger? 1 or -2? 1 is larger because it is to the right of the -2. What numbers are smaller than -2? -3 and -4 are both smaller than -2 because they are to the left of -2.

Comparing Numbers Line up the numbers vertically (up and down) by the ones place (or the decimal, if there is one). Start at the left and compare the digits. Move towards the right until you find a difference.

Just a Reminder… < means “less than.” > means “greater than.” = means “equal to.”

Example 45,312 45,321 45,312 45,321 1 is less than 2 <

Example 2 – Put the numbers in order from least to greatest. 321; 345; 354; 29; 1,013; 312; largest smallest 29 1, <<< <<

Homework Time Commonly Misspelled Numbers: hundred thousand eight forty ninety