If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Equivalent expressions with common denominators


At a science museum, Julia compares the length of a T-rex tooth and a crocodile tooth. The T-rex tooth is 712 foot long. The crocodile tooth is 14 foot long.
What expression can be used to find how much longer the T-rex tooth is than the crocodile tooth?
Choose 1 answer: