Contrapositive

Contrapositive Sweatsocks

By Mr. J Minyard

Read about conditional statements....

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Continue reading

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Page 1

​Keep reading, there will be a couple of questions about it :)

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Page 2 cont.

​Read through the questions to answer on the next slide...

Open Ended

Pick two of the sentences from 2-5 and rewrite below. [The image has the problems from the previous slide.]

​Keep reading (why are they talking about Converse?)

​Converse, inverse, & contrapositive. Oh my!

Multiple Choice

Given the conditional statement;

"If I am hungry, then I eat."

Which of the following is the inverse?

• If I eat, then I am hungry.

• If I don't eat then I am not hungry

• If I am not hungry, then I don't eat.

• If I am not hungry, then I eat.

Multiple Choice

Given the conditional statement;

"If Max gets good grade, then he won't be grounded"

Which of the following is the contrapositive?

• If Max isn't grounded then he gets good grades.

• If Max doesn't get good grade then he will be grounded.

• If Max gets grounded then he doesn't get good grades.

• If Max gets good grades, the he will get grounded.

Multiple Choice

Given the conditional;

"If Jose eats fish, then he has an allergic reaction"

Which of the following is the converse?

• None of these

• If Jose doesn't have an allergic reaction, then he didn't eat fish.

• If Jose doesn't eat fish, then he doesn't have an allergic reaction.

• If Jose has an allergic reaction, then he ate fish.

Multiple Choice

Given the conditional;

"If Ty'Shawn is late then he will get a tardy"

What is the inverse?

• If Ty'Shawn is on time, then we won't get a tardy.

• If Ty'Shawn gets a tardy, then he is late.

• If Ty'Shawn is late then he won't get a tardy.

• If Ty'Shawn doesn't get a tardy, then he is on time.

Multiple Choice

Given the conditional;

"If our class earns ten trucks, then we get a treat."

What is the contrapositive?

• If our class doesn't earn ten trucks then we don't get a treat.

• If our class doesn't get a treat, then we didn't earn ten trucks.

• If out class earns ten trucks then we don't get a treat.

• Trucks!

Multiple Choice

Given the conditional;

"If it snows then school will be closed"

Which is the inverse?

• If school is open, then it didn't snow.

• If school is closed, then it snowed.

• If it doesn't snow, then school will be open.

• Let it Snow!

Multiple Choice

Given the conditional;

"If it is a duck then it has a beak."

Which is the converse?

• If isn't not a duck, then it doesn't have a beak.

• If it is a duck, then it quacks.

• If it doesn't have a beak, then it's not a duck.

• If it has a beak, then it is a duck.

Multiple Choice

Given the conditional "If I study, then I will do well on the quiz" and what is the statement "If I don't study then I won't do well on the quiz"?

• Converse

• Inverse

• Contrapositive

• Contrainverse