913
-426
Since the 6 is larger than the 3 and the 2 is larger than the 1, you will have to regroup two times.
No idea sorry bud.
With addition, you need to regroup in the event that there are more than 10 ones or 10 tens. In a subtraction, you must regroup whenever there are insufficient ones or tens to subtract.
-423
No
you need to regroup when the bottom number is bigger than the top number
108
no
If the total in any column exceeds nine, you will have to regroup.
Ten times because 6 minus 10 times 0.6 = 0
Yes.
38
No.