This Grade 2 worksheet asks students to sort addition and subtraction problems by whether regrouping is needed or not. Kids look at each 3-digit problem and decide if any column will carry or borrow. Fill-in items ask for simple 3-digit sums with no regrouping, and true-or-false questions check place-value thinking. The sheet builds the habit of checking each column before starting, which is a key Grade 2 skill for adding and subtracting within 1000 accurately.