Central Idea Practice: Adding and Subtracting Rational Expressions

What is the first step in identifying the central idea of a text?

• Write a summary of the text

• Identify the topic by finding repeating words

• Determine the text's complexity

• Identify the author's background

What does the word 'unique' in the title suggest about the pennies?

• They are rare

• They are common

• They are old

• They are new

Which year's penny is mentioned as being particularly valuable?

• 1943

• 1972

• 1955

• 1965

What does the term 'double die' refer to in the context of pennies?

• A minting error

• A storage method

• A cleaning process

• A type of metal

What is the central idea of the passage about rare pennies?

• Rare pennies can be worth a lot of money

• Double die pennies are not rare

• All pennies are valuable

• Pennies from 1943 are the most valuable

Which feature of the platypus is highlighted as being particularly odd?

• It uses electroreception

• All of the above

• It is a mammal

• It is venomous

What unique method does the platypus use to detect its prey?

• Vision

• Electroreception

• Smell

• Hearing

Why is the platypus considered an odd mammal?

• It is venomous

• It uses electroreception

• All of the above

• It lays eggs

What is the central idea of the passage about the platypus?

• The platypus can fly

• The platypus is an odd mammal

• The platypus is venomous

• The platypus lives underwater

Which of the following is not a characteristic of the platypus?

• It is a mammal

• It lays eggs

• It is not venomous

• It uses electroreception