VOCABULARY GOAL 1

EXPRESSION: Numbers, symbols and operators (such as + and -) grouped together that show the value of something.

VARIABLE: A symbol for a number we don't know yet. It is usually a letter like n or x.

PARENTHESIS: Parentheses or "round brackets" are the familiar ( ) symbols used in pairs to group things together. 

EQUATION: An equation says that two things are equal. It will have an equals sign "="

SOLVE: A value we can put in place of a variable (such as x) that makes the equation true.

PATTERN: Things that are arranged following a rule or rules. Example: there is a pattern in these numbers: 2, 7, 12, 17, 22, ... they follow a rule "start at 2 and add 5 each time"