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This Addition With Regrouping drill has 40 problems for Grade 2. Sandwiches theme. Answer key included.
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Max must regroup sandwich orders before the hungry lunch crowd arrives at the shop!
Standard: CCSS.MATH.2.NBT.B.5
Addition with regrouping is a critical stepping stone in your child's math journey because it moves beyond simple facts into true problem-solving. At ages 7-8, second graders are developing the abstract thinking needed to understand that 10 ones can become 1 ten—a concept that feels magical when it clicks. This skill builds the foundation for all future multi-digit math, from three-digit addition in third grade to multiplication and division later on. When your child masters regrouping, they're not just memorizing; they're learning how our number system works. They're building confidence to tackle problems they initially thought were too hard, like 27 + 15, and discovering they can figure out tricky problems using what they already know about place value.
The most common error is forgetting to carry the regrouped ten or writing it in the wrong column. For example, a child adds 8 + 6 = 14, writes the 4 in the ones place correctly, but then forgets to add that 1 ten to the tens column, giving an answer like 24 instead of 34. Another frequent mistake is writing both digits of the sum (14) in the ones place rather than regrouping. You can spot this by looking for answers that are way too large or by watching whether your child pauses and regroups, or rushes through without showing the extra ten.
Try a real kitchen activity: ask your child to count out two piles of crackers or small sandwich ingredients (like 18 and 16 pieces). Have them group every 10 items into a pile, then count the total. Say aloud: 'We have 8 ones plus 6 ones—that makes 14 ones, which is 1 ten and 4 ones!' Repeat this once weekly with different amounts so the physical grouping becomes automatic in their mind before they see it on paper.