kenneth has 22 math problems to do for homeworks he has 12 problems done. How many more problems does he have left? If he completes 1 problem every minute, how many more minutes does he have to work?

22 - 12 = ?

10

I think it is nine minutes.

To find out how many more math problems Kenneth has left to do, subtract the number of problems he has already done from the total number of problems he needs to do.

Total number of math problems: 22
Problems Kenneth has already done: 12

Remaining problems = Total problems - Problems already done
Remaining problems = 22 - 12 = 10

Kenneth has 10 more math problems left to do.

Now, let's calculate how many more minutes Kenneth has to work if he completes 1 problem every minute.

To find out the number of minutes, multiply the number of remaining problems by the time it takes to complete one problem.

Number of remaining problems: 10
Time taken to complete one problem: 1 minute

Remaining time = Remaining problems x Time taken for one problem
Remaining time = 10 x 1 = 10 minutes

Kenneth has 10 more minutes of work to complete his remaining 10 math problems.