Chapter 1 Vocabulary

A combination of variables, numbers and at least one operation.

A letter in place of a number

The branch of mathematics that uses letters in place of numbers

Pairs of operations that undo each other

The set of whole numbers and their opposites. ...-2, -1, 0, 1, 2.....

Two numbers with the same absolute value but different signs. 1 and -1

The rules to follow when more than one operation is used in an expression.

The distance a number is from zero on the number line. ǀ-2ǀ = 2

To find the value of an expression. Replacing variables with numbers.

A mathematical sentence that contains an equal sign.