| A | B | 
|---|
| place value | the value given to the place a digit has in a number | 
| expanded form | a way to write a number that shows the place value of each digit | 
| = | equal to | 
| < | less than | 
| > | greater than | 
| decimal point | a symbol used to separate the ones place from the tenths place in a decimal or dollars from cents in money | 
| digits | symbols used to show numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 | 
| word form | a way to show a number using words | 
| period | a group of three digits in a number that is separated from other groups by a comma | 
| exponent | a number that tells how many times another number is used as a factor | 
| base | a number multiplied by itself the number of times shown by an exponent | 
| decimal | a number that uses a decimal point to show tenths, hundredths, thousandths, and so on | 
| standard form | a way to write a number that shows only digits | 
| number line | a line that shows numbers in order using a scale | 
| equivalent decimals | decimals that name the same amount | 
| 10 to the 4th power | 10 x 10 x 10 x 10 | 
| one hundred | 10 to the second power (ten squared) | 
| 10 x 10 x 10 x 10 x 10 | 100,000 | 
| one million | 10 to the 6th power | 
| 0.01 | one hundredth | 
| 0.6 | six tenths | 
| 0.723 | seven hundred twenty-three thousandths | 
| 315,703 | three hundred fifteen thousand, seven hundred three | 
| 23.09 | twenty-three and nine hundredths |