Evaluating Expressions with Variables

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number that can change or vary.

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 expression for dividing a total amount equally among friends?

Back

Front

How do you represent a situation where one quantity is more than another?

Back

If quantity A is more than quantity B by a certain amount, it can be represented as A = B + amount.

Front

What is the formula for the total weight of Bob's cat if the rabbit's weight is r?

Back

Front

How do you express the weight of Bob's dog in terms of the rabbit's weight?

Back

Front

What is the first step in solving an equation with variables?

Back

The first step is to isolate the variable on one side of the equation.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form by combining like terms and performing operations.

Front

How do you find the total when combining two amounts?

Back

To find the total of two amounts, you add them together: Total = Amount1 + Amount2.

Front

What is the importance of parentheses in mathematical expressions?

Back

Parentheses indicate which operations should be performed first in an expression.