1. Replacing a number with
rounding a number that tells about
how many or how much
standard A way to write a number
showing only its digits.
form
expanded A number written as the
sum of the values of
form its digits.
One part of 100 equal
hundredth parts of a whole.
A dot used to separate
decimal point dollars from cents or ones
from tenths in a number.
A number written in words.
word form (i.e.: four thousand, six
hundred, thirty two).
tenth One of ten equal parts of
a whole.

2. In a number, a group of three
period digits, separated by commas,
starting from the right.
The numbers multiplied
factors together to find a product.
Example: 3 6 18
The answer to a
product multiplication problem.
A way of displaying
array objects in rows
and columns.
The product of any two
multiple whole numbers.
fact family A group of related facts using
the same set of numbers.
An operation to find the
divide number in each group or the
number of groups.

3. dividend The number to be divided.
The number by which
divisor another number is divided.
The number that results from
quotient the division of one number by
another.
compatible Numbers that are easy to
numbers compute mentally.
partial Products found by breaking one
factor into ones, tens, hundreds,
and so on and then multiplying
products each of these by the other factor.