| A | B |
|---|
| place value | the value of a digit depending on its place in a number (ones, tens, hundreds) (an 8 in the tens place has the value of 80) |
| whole number | a counting number from zero to infinity; not including fractions or decimals |
| period | a group of digits separated by commas in a written number (units, thousands, millions) |
| standard form | each number is written in its place value (six hundred twenty-eight in standard form is 628) |
| expanded notation | a way of writing numbers as the sum of each represented place value (600+20+8) |
| digit | symbol used to show a number; also known as a numeral |
| rounding | a type of estimation with specific rules (4 or less, let it rest: 5 or more, raise the score) |
| compatible numbers | numbers that are easy to compute mentally (7+3) |
| addition | to join two or more numbers to get a total (sum) |
| addend | any numbers used to get the total (numbers in an addition problem) |
| sum | the total or whole amount or the answer to an addition problem |
| subtraction | to take one quantity away from another |
| difference | the answer to a subtraction problem |
| decrease | to get smaller in size or number |
| increase | to get bigger in size or number |
