In two words, what is an expression?
Expressions are combinations of numbers and/or operations. To evaluate an expression, substitute values for any variables and calculate the result. Evaluating an expression usually requires using the order of operations.
Order of Operations: the order in which mathematic operations must be performed when evaluating an expression. It is usually represented with the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction)
Operands: the values or variables used in an expression. They are the objects that the operators act on.
Operators: the symbols that indicate an operation (e.g. +, -, *, /, etc.)
Did you know?
In mathematics, evaluating an expression means to find its value, i.e. to determine what number it represents. The process of evaluating an expression involves substituting the values of all the variables, constants and operators to find a single number or value. The process of evaluating an expression is sometimes referred to as simplif
Work together in pairs: What is the difference between the order of operations and the distributive property when evaluating expressions?
What is the value of the expression 3x + 2y when x = 4 and y = 5?
Work together in pairs: What is the difference between evaluating an expression and simplifying an expression?
What is the value of 5 + 3 * 2?
Simplify the expression: 4 - (2 + 1)
Evaluate the expression: (6 - 2) * (4 + 3)
What is the result of 8 divided by 2 times (6 - 4)?
Simplify the expression: -5 + (-3) * (-2)