Glossary
a fourthOne 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