Evaluate and Write Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, ×, ÷) 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 the variables with numbers and performing the operations.

Front

What is the order of operations?

Back

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

Front

How do you write '10 minus the sum of 2 and 3' as an expression?

Back

10 - (2 + 3) is the correct expression.

Front

What does 'divide the difference of 27 and 3 by the difference of 16 and 4' mean in mathematical terms?

Back

It means to calculate (27 - 3) ÷ (16 - 4).

Front

How do you express 'the sum of 3 and 5, divided by 4'?

Back

It is expressed as (3 + 5) ÷ 4.

Front

What is the expression for '8 plus the quotient of 27 and 3'?

Back

The expression is 8 + (27 ÷ 3).

Front

Back

The result is 8.

Front

What is a variable in an expression?

Back

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

Front

What is a coefficient?

Back

A coefficient is a number that is multiplied by a variable in an expression, such as in 3x, where 3 is the coefficient.