Question

rename the number use the place value 805 tens =

Answer 1

What you do is: 
1. 805*10

Then you find your answer, 
8050. 

Thank You!

Answer 2

To rename this you need to multiply 805 by 100. Then you will have your answer. Lets of it:-

805 tens
805 × 10 = 8050 

So, 805 tens is 8050.

Hope I helped ya!!