3.4-3.5 Evaluate Expressions

Front

What does '5 less than a number n' mean in mathematical terms?

Back

It is represented as n - 5.

Front

Evaluate the expression 7 + j if j = 2.

Back

9

Front

How do you express '12 times as many cookies c' mathematically?

Back

It is represented as 12c.

Front

If pencils are sold in packages of 12, how do you express the total number of pencils in p packages?

Back

It is represented as 12p.

Front

Evaluate the expression 8a - b if a = 10 and b = 6.

Back

74.

Front

What is an expression?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) that represents a value.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equal sign, while an equation does.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting variables with numbers.

Front

What is a variable in mathematics?

Back

A variable is a symbol (like x or n) that represents an unknown value.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.