Question

3. Subtract 20 min 30 sec from 30 min 20 sec
show how to do​

Answer 1

answer is 610 because:

1)they told that to substract (20min-30sec)-(30m-20sec)

2)in this equation first we have to convert 20min and 30min into seconds so,

3)1min:30sec,so( 20×60-30)-(30×60-20)=610

:•hence proved