Max Rescues the Math-Heroes Kingdom: Addition Quest

About this Grade 2 Addition With Regrouping Drill

Addition with regrouping is a crucial bridge skill that helps your second grader move beyond simple single-digit facts into real-world math. When children add numbers like 17 + 15, they learn to regroup (or "carry") the tens place—a fundamental concept that underpins all multi-digit math they'll encounter. At ages 7–8, students' brains are developing the ability to hold multiple steps in mind at once, and regrouping practice strengthens this working memory. This skill also builds confidence: once kids master regrouping with two-digit numbers, three-digit addition and eventual subtraction become manageable. Beyond the classroom, regrouping shows up everywhere—calculating allowance savings, combining toy collections, or figuring out total snacks at a party. Repeated, focused practice on addition with regrouping anchors the concept so firmly that it becomes automatic, freeing mental energy for more complex problem-solving later.

What your student will practice

• Regroup ones as tens when a ones column sum exceeds nine
• Accurately add two-digit numbers using the standard algorithm
• Write regrouped tens in the tens column with clear notation
• Solve 8–12 addition problems with regrouping in one sitting

Common mistakes to watch for

The most common error is forgetting to add the regrouped ten to the tens column, or adding it incorrectly. You might see a child solve 18 + 14 by writing 2 (from 8 + 4) in the ones place but then ignoring that extra ten, writing 2 as the final answer instead of 32. Another frequent mistake is misplacing the small '1' above the tens column or writing it so faintly that they forget it exists. Watch for students who understand the concept but rush and skip the regrouping step entirely, treating 18 + 14 as if it were 8 + 4 only.