Expressions Review

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest number that is a multiple of each of the numbers.

Front

How do you find the LCM of two numbers?

Back

To find the LCM of two numbers, list the multiples of each number and find the smallest multiple that appears in both lists.

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.

Front

What is a variable in an expression?

Back

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

Front

If x = 5, what is the value of the expression 3x - 9?

Back

The value is 3(5) - 9 = 15 - 9 = 6.

Front

What is a mathematical problem involving LCM?

Back

Brandon practices every 4th day and plays games every 6th day. To find when both occur, calculate the LCM of 4 and 6, which is 12.

Front

How do you determine how many students received both prizes?

Back

To find how many students received both prizes, calculate the LCM of the intervals (6 and 9) and divide the total number of students by that LCM.

Front

What is the expression for Delaney's sales if x represents Elizabeth's sales?

Back

The expression is 3x - 9, meaning Delaney sold 9 less than 3 times what Elizabeth sold.

Front

What is the relationship between packs of hot dogs and buns?

Back

Hot dogs come in packs of 8 and buns in packs of 10. To have equal amounts, find the LCM of 8 and 10, which is 40.