There is no such number.
You can add 456000
or 456878322168000
or even 1581687671173873681773618733111
96475
don't know
It is 634. 9-3 = 6 9-6 = 3 9-5 = 4 365 +634 =999 No regrouping required.
6 times
-423
Any number. Not everyone needs to regroup.
96475
100
don't know
634
Oh, dude, you can add up to 9 to 74,253 without having to regroup. So, like, you could add 9 and get 74,262, but if you tried to add 10, you'd have to regroup and carry the one. But hey, who's counting, right?
It is 634. 9-3 = 6 9-6 = 3 9-5 = 4 365 +634 =999 No regrouping required.
6 times
-423
Zero. I would not both er with regrouping.
2
4