Second grade is the year of the second column. Both numbers are two digits, so every problem is a 10-to-99 addition or subtraction written vertically - the format where carrying and borrowing actually have to be worked rather than counted on fingers.
Regrouping is left on Both, which mixes problems that carry with problems that do not, so a student has to decide each time instead of applying one rule down the page. Switch it to Regrouping Only when carrying is the thing being taught, or No Regrouping for the week before.
Set Regrouping to Regrouping Only in the advanced options and every problem will need a carry or a borrow. Addition With Regrouping and Subtraction With Regrouping are set up that way already.
No. The generator orders each subtraction problem so the answer is zero or greater.
Yes, free to generate, download and print, with no account and no watermark.