Writing Expressions from Word Problems

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

How do you write an expression for a total amount?

Back

To write an expression for a total amount, you typically add or subtract quantities. For example, if you have 'x' apples and 'y' oranges, the total is represented as 'x + y'.

Front

What does 'h' represent in the expression 10h?

Back

'h' represents the number of hours worked.

Front

How do you represent a decrease in quantity using an expression?

Back

A decrease is represented by subtraction. For example, if you have 50 and lose 'x', it is represented as '50 - x'.

Front

What is the perimeter of a triangle with sides a, b, and c?

Back

The perimeter is calculated as P = a + b + c.

Front

How do you express the total number of items in rows and columns?

Back

If there are 'r' rows and 'c' columns, the total number of items is expressed as 'r * c'.

Front

What does the variable 'm' represent in the expression 30m + 25?

Back

'm' represents the number of months.

Front

How do you write an expression for total earnings?

Back

Total earnings can be expressed as the product of hourly wage and hours worked, minus any expenses. For example, if you earn $10/hour and work 'h' hours, the expression is '10h - expenses'.

Front

What is the expression for the total number of chairs if there are 'r' rows with 8 chairs each?

Back

The expression is '8r'.

Front

How do you represent a total cost that includes a fixed fee and a variable cost?

Back

The total cost can be expressed as a sum of the fixed fee and the variable cost. For example, if the fixed fee is $25 and the variable cost is $30 per month, it is '30m + 25'.