## Standards with the same topic and subject but for other grades

An algebraic expression, an expression with a variable, is like a phrase; a phrase does not have a verb, so an expression does not have an equal symbol (=).

Students at this level are not expected to use the term expression.

The student will simplify whole number numerical expressions using the order of operations.

A verbal expression describing a relationship involving one operation can be represented by an expression with a variable that mathematically describes the relationship. Numbers are used when quantities are known; variables are used when the quantities are unknown.

An expression is a representation of a quantity. It contains numbers, variables, and/or computational operation symbols. It does not have an equal symbol (e.g., 5, 4 + 3, 8 − 2, 2 × 7).

The student will simplify whole number numerical expressions using the order of operations.

Use an expression with a variable to represent a given verbal expression involving one operation (e.g., “5 more than a number” can be represented by 𝑦 + 5). (c)

A verbal expression involving one operation can be represented by a variable expression that describes the relationship. Numbers are used when they are known; variables are used when the numbers are unknown. The example in the table below defines the relationship between the input number and output number as x + 3. Students at this level are not expected to write a variable expression to describe patterns. They might describe the pattern below as + 3 or given any number, add three. [Graphic cannot be reproduced.]

investigate and describe the concept of variable;

Understand that an expression uses symbols to define a relationship and shows how each number in the list, after the first number, is related to the preceding number.