Pre A 3-4: Writing 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 write an expression for a word problem?

Back

It means to translate the words of the problem into a mathematical expression using numbers and variables.

Front

What is a variable?

Back

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

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change, such as the number 7 in the expression 3x + 2y + 7.

Front

How do you identify the number of terms in an expression?

Back

Count the number of separate parts in the expression, which are usually separated by + or - signs.

Front

What is the expression for 'eight plus triple the number of shirts'?

Back

8 + 3s, where s is the number of shirts.

Front

How do you express 'six times the number of girls'?

Back

6g, where g is the number of girls.

Front

What does '10 less than a number n' mean in expression form?

Back

n - 10.

Front

What is the difference between an expression and an equation?

Back

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

Front

What is a coefficient in an expression?

Back

A coefficient is a number that multiplies a variable, such as 3 in 3x.