| A | B |
|---|
| hundred thousand | 10 ten thousands |
| standard form | a number written with one digit for each place |
| word form | a number written in words |
| periods | groups of three places |
| million | 10 hundred thousands |
| place value | the value of the place of a digit in a number |
| compatible numbers | numbers that are easy to add, subtract, multiply, or divide |
| greater than (>) | representing more of a quantity |
| less than (<) | representing less of a quantity |
| round | to find the nearest ten, hundred, thousand, and so on |
| estimate | to find a number close to an exact amount |
| front-end estimation with adjustment | an estimation made by computing with the digits in the greatest place and then adjusting it to include the remaining place values |
| expanded form | a number written to show the value of each digit |
