Tony took 7/10 of an hour to finish his exercise. How many minutes did he take?

Question

please help me i dont get this at allllllllllllllllll!!!!!!!!!!!!!!!!!!!!!!! plz someone just help me i dont get this at all!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! plzzzzzz help meeeeeeeeeee stupid math homework

Answer 1

A sllightly simpler way of doing exactly what Philip did is to think about what 7/10 means.  It means seven tenths, right?  So, a tenth of 60 minutes.  Well, that's just 60/10, right?  Or, in other words, just knock the 0 off the 60.  You'll get 6, which is one tenth of an hour.

 

But we want SEVEN tenths, don't we?  Well, that's just seven of those tenths, which we can say mathematically as 7 times 6.  Wait a minute!  We know the answer to that one!  It's 42!

 

Does that help?  It's the same thing Philip did, just worded slightly differently to match how my brain works a little bit better.

Answer 2

There are 60 minutes in one hour.  If I told you that Tony took 1/2 hour to finish his exercise, you'd know that 1/2 hour is 30 minutes.  You get that by multiplying 60 minutes by 1/2: (1/2)*(60 minutes) = 60/2 = 30 minutes. 

 

So if Tony took 7/10 of an hour to finish his exercise, that's 7/10 of 60 minutes:

 

(7/10)*(60 minutes) = 420/10 = 42 minutes

 

Not so hard, was it?