**quotient**

the answer to a division problem

**sum**

the answer to an addition problem

**product**

the answer to a multiplication problem

**difference**

the answer to a subtraction problem

**square unit**

a unit, such as a square centimeter or square inch, used to measure area

**partial unit**

a unit used to measure area whose side equals less than one whole (a fraction)

**column**

a vertical group of objects, running up and down

**row**

a horizontal group of objects, running left to right

**area**

the number of square units needed to cover a surface (length x width)

**cubic unit**

a unit, such as a cubic inch, used to measure volume or capacity

**grouping symbols**

parentheses ( ), brackets [ ], or braces { } that group parts of an expression

**numerical expression**

a combination of numbers and operations

**rectangular prism**

a solid 3-D figure in which all six faces are rectangles

**3-dimensional**

an object that has length, width, and depth (thickness), like any object in the real world

**2-dimensional**

a shape that only has two dimensions such as length and width) and no thickness

**volume**

the amount of space an object takes up