What is the greatest 3 digit number you can subtract from 426 so that you would need to regroup? explain.

419

Step-by-step explanation:

According to regrouping in subtraction for a group we borrow 1 place value from preceding group, so that the operation can be completed.

For example: We need to find the value of 42-27

We can not subtract 7 from 2. So we will borrow 10 from 40 and give it to 2.

Now,

We need to find the greatest 3 digit number that can subtract from 426 so that we need to regroup.

To use regroup, the once digit must be more that 6. So, maximum value for once place is 9.

Therefore, the greatest 3 digit number that can subtract from 426 by using regroup is 419.