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This Addition With Regrouping drill has 40 problems for Grade 2. Palm Trees theme. Answer key included.
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Max spotted 47 coconuts stuck in the palm trees—he must collect them all before the tropical storm hits!
Standard: CCSS.MATH.2.NBT.B.5
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Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 2 Addition With Regrouping Drill
Addition with regrouping is a crucial bridge in second-grade math because it moves students beyond simple facts into multi-digit problem-solving. When children add numbers like 24 + 18, they discover that 4 + 8 equals 12—too large for the ones place—so they must regroup (or "carry") that extra ten to the tens column. This develops their understanding of place value, which is the foundation for all future math success. At ages 7–8, students are developing stronger working memory and logical thinking, making this the perfect time to practice regrouping. Mastering this skill builds confidence and prepares them for subtraction with regrouping, multiplication, and division. Real-world math moments—like combining coins, counting classroom supplies, or tracking points in games—all require this same thinking, making regrouping deeply practical.
What your student will practice
- Identify when the ones column sum exceeds 9 and requires regrouping
- Correctly regroup ones into tens and add to the tens column
- Solve two-digit addition problems with regrouping accurately
- Explain why a number "moves up" to the next column using place value language
Common mistakes to watch for
The most common error is forgetting to add the regrouped ten to the tens column. A student might solve 27 + 15 by adding 7 + 5 = 12, writing down the 2 in the ones place but then ignoring that extra ten, arriving at 32 instead of 42. Another frequent mistake is misaligning digits—writing the numbers sloppily so the ones and tens columns don't line up clearly. Watch for students who add all three numbers at once (7 + 5 + the regrouped ten simultaneously) and lose track of which step they're on. You'll spot this pattern when their answers are close but the tens digit is consistently one off.
Play a game where you and your child count out objects like blocks, buttons, or even shells collected near palm trees during a nature walk, combining two piles at a time. Start with amounts like 18 + 14, physically bundling 10 objects together when you reach 10 ones, then counting all the bundles. This hands-on model shows exactly why and how regrouping works. Repeat this 2–3 times weekly in short five-minute sessions, gradually moving to drawing circles (bundles) instead of using real objects, then finally to the written numbers. Seeing regrouping happen in front of them makes the abstract concept concrete and memorable.