| A | B |
| fraction | a number that names part of a whole or part of a group |
| denominator | the number below the bar in a fraction. It tells the total number of equal parts or groups into which the whole or group has been divided |
| numerator | the number above the bar in a fraction. It tells how many of the equal parts of the whole or group is being considered. |
| equivalent fractions | two or more fractions that name the same amount |
| mixed number | a number represented by a whole number and a fraction |
| prime number | a number that has itself and 1 as its only factors |
| composite number | a number that has at least one other factor besides itself and one |
| decimal | a number that uses place value and a decimal point to show tenths, hundredths, and so on |
| estimate | rounding numbers to find out about how many |