Question

It took Marty 42 minutes to write a book report then he spend 18 minutes correcting his report explain how you use mental math to find how long Marty spend on his book report

Answer 1

it took Marty 60 minute to finish the report mentally you add 42 plus 8 is 50 plus 10 (because 18 minus 8 is 18) then that equals 60

Answer 2

The time Marty spend on his book report is:

60 minutes or 1 hour

Explanation:

It took Marty 42 minutes to write a book report then he spend 18 minutes correcting his report.

This means that the total time i.e. the overall time he spends on his book is:

Time he spend on writing the book+ The time he spend on correcting his book report

Hence,

Total time= 42 minutes+18 minutes

i.e.

Total Time= 60 minutes

Also, we know that:

1 hour= 60 minutes.

Hence, his total time is: 60 minutes or 1 hour.