Evaluate Expressions

Front

What is an expression in mathematics?

Back

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

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting variables with numbers and performing the operations.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that dictates the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right) - often abbreviated as PEMDAS.

Front

If an apple costs 2 dollars and you buy 3 apples, how much do you spend?

Back

6 dollars.

Front

If you have 18 cups of flour and divide it into 2a parts, what is the value of each part when a=3?

Back

Each part receives 3 cups of flour.

Front

What is the total cost of buying 3 packs of pencils at $7 each and 4 packs of erasers at $8 each?

Back

The total cost is 85 dollars.

Front

What is the area of a square garden with side length b?

Back

The area is b² square meters.

Front

If the area of a garden is b² and you add 4 square meters for a border, what is the new total area when b=3?

Back

The total area is 13 square meters.

Front

What is the first step in evaluating the expression 3 + 4 x 6 - 4?

Back

The first step is multiplication.

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.