| a number to be added to another. | addend |
| A 100th of the base metric unit | centi |
| Numbers that compute together easily | compatible |
| A 10th of the base metric unit | deci |
| A mixed number that uses place values to the right of the decimal point to express the fractional portion. | decimal |
| 10 times the base metric unit | deka |
| The solution to a subtraction problem | difference |
| A number that is to be divided. (inside the box) | dividend |
| A number used to divide another number. (outside the box) | divisor |
| a mathematical sentence that says that two quantities are equal | equation |
| to find a number that is close to the exact answer | estimate |
a number written as the sum of the value of its digits.
486 = 400 + 80 + 6 | expanded form |
| a number multiplied by another number to find a product | factor |
| 100 times the base metric unit | hecto |
| 1000 times the base metric unit | kilo |
| A system of measurement that is based on place values and the decimal system | metric |
| A 1000th of the base metric unit | milli |
| a number from which another number will be subtracted | minuend |
| The solution to a division problem | quotient |
| the number that is left over after dividing - can be expressed as a fraction or decimal | remainder |
| replacing a number by expressing it to the nearest place value. | round |
| a way to write very large or very small numbers using decimals and powers of 10 | Scientific Notation |
| A number written with commas separating groups of 3 digits. | standard form |
| the number that is to be subtracted from another number | subtrahend |
| the result of an addition problem | sum |
| an amount that can change or is unknown. (often displayed as a letter) | variable |
| a number written in "English" as it is read. (four hundred six) | word form |