Max Conquers the Baseball Stadium: Addition Regrouping Blitz!

About this Grade 2 Addition With Regrouping Drill

Addition with regrouping is a foundational skill that helps second graders move beyond simple, single-digit facts into the two-digit numbers they encounter every day. When children learn to regroup (or "carry"), they're really learning how our base-ten number system works—why 10 ones become 1 ten, and why that matters. This skill builds mathematical thinking and problem-solving that will support multiplication, division, and algebra later on. At ages 7-8, students' brains are ready to handle this abstract step of bundling groups, which is why Grade 2 is the perfect time to introduce it. Mastering regrouping now prevents frustration when numbers get larger and more complex. When a child confidently solves 27 + 15, they're not just memorizing; they're applying logic and understanding place value in a real way.

What your student will practice

• Identify when a sum requires regrouping in the ones place
• Regroup tens and ones correctly in two-digit addition
• Solve two-digit addition problems with regrouping accurately
• Explain their regrouping steps using place-value language

Common mistakes to watch for

The most common error is students forgetting to add the regrouped ten to the tens column. For example, when solving 18 + 14, they'll correctly get 12 ones and regroup to make 1 ten and 2 ones, but then write the answer as 32 instead of 32 because they forgot to add that 1 regrouped ten to the 1 + 1 already in the tens place. Another frequent mistake is writing the regrouped ten in the wrong column or not writing it down at all, making the problem invisible. Watch for a student who gets 27 + 15 right but 28 + 15 wrong—that pattern reveals they haven't internalized the regrouping step yet.