Exploring Adding and Subtracting Rational Expressions

This lesson focuses on translating expressions by using key phrases for mathematical operations. It covers how to convert sentences into mathematical expressions and vice versa, emphasizing the importance of recognizing key phrases for addition, subtraction, multiplication, and division. The lesson also highlights the need to reverse the order of terms in certain expressions. Examples are provided to illustrate these concepts, and students are guided on how to write expressions in words.

What is the main focus of this lesson?

• Understanding calculus

• Solving complex equations

• Learning about geometry

• Translating expressions between words and math

Which of the following is a key phrase for addition?

• Sum

• Product

• Difference

• Quotient

Which word indicates subtraction?

• Times

• Divided by

• Less than

• Increased by

What does the word 'triple' mean in mathematical terms?

• Divide by three

• Add three

• Multiply by three

• Subtract three

Which phrase indicates division?

• Sum

• Difference

• Times

• Quotient

How would you write '18 less than a number' as an expression?

• 18 - x

• x + 18

• x - 18

• 18 + x

What is the expression for 'the product of a number and 6'?

• x / 6

• x - 6

• x + 6

• x * 6

How would you express '7 added to a number'?

• x * 7

• 7 / x

• x + 7

• 7 - x

What does 'half of a number' translate to in an expression?

• 2 * x

• x / 2

• x + 2

• x - 2

How would you write '20 more than half a number' in words?

• 20 + x / 2

• x / 2 + 20

• 20 - x / 2

• x / 2 - 20