1.
Property A rule that says you can change the order of numbers in addition or multiplication without changing the result.
2.
Property A rule that says you can change the grouping of numbers in addition or multiplication without changing the result.
3.
Property A rule that lets you multiply a sum by multiplying each addend separately and then add the products.
4.
Operation An operation that reverses the effect of another operation.
5.
Element A number that, when used in an operation with another number, leaves the other number unchanged.
6.
A method of thinking that helps to make sense of things and solve problems.
7.
A conclusion reached based on evidence and reasoning.
8.
Something that is accepted as true without proof.
9.
Drawing a specific conclusion from general information.
10.
A repeated design or recurring sequence in data.
11.
A document showing what you bought and how much you paid.
12.
A statement of money owed for goods or services provided.
13.
A reduction in the usual price.
14.
An extra amount added to the cost of goods or services.
15.
Extra money given for good service.
