## Glossary

**a fourth**

One piece of a shape split into 4 pieces that are the same size.

A fourth, or a quarter, of the square is shaded.

**a half**

One piece of a shape split into 2 pieces that are the same size.

A half** **of the rectangle is shaded.

**category**

**data**

Example: If you have a box of colored pencils, then the lengths and colors of each of the pencils are data about the pencils in the box.

**difference**

**estimate**

To find a value that is close to the correct value.

**fourths**

The pieces created when a shape is split into 4 pieces that are the same size.

The circle is split into fourths, or quarters.

**greater than**

63 is greater than 32.

63 > 32

**half-past**

This clock shows half-past 4 o’clock or 4:30.

**halves**

The pieces created when a shape is split into 2 pieces that are the same size.

The circle is split into halves.

**length**

The measure of how long an object is in same-size units with no gaps or overlaps.

Example: The length of this sneaker is 15 cubes long.

**less than**

32 is less than 63.

32 < 63

**o’clock**

The clock shows 2 o’clock or 2:00.

**sum**

**survey**

**teen number**

A number with 1 ten and between 1 and 9 ones.

Example:

Fifteen is 1 ten and 5 ones.

**two-digit number**