Free printable math drill — download and print instantly
This Addition With Regrouping drill has 40 problems for Grade 2. Time Travelers theme. Answer key included.
⬇ Download Free Math DrillGet new free worksheets every week.
All worksheets checked by our AI verification system. No wrong answers — guaranteed.
Max discovered a broken time machine! He must solve addition problems fast to escape the prehistoric jungle before dinosaurs arrive.
Standard: CCSS.MATH.2.NBT.B.5
Addition with regrouping is a critical bridge in your child's math journey. At ages 7-8, students are moving beyond simple single-digit facts to solve real problems—like figuring out how many trading cards they have if they started with 17 and got 15 more. This skill teaches children that numbers can be broken apart and rebuilt in different ways, which strengthens their understanding of place value (tens and ones). When students master regrouping, they build confidence and flexibility in thinking about numbers—skills they'll use for subtraction, multiplication, and beyond. Kids who understand regrouping develop stronger number sense because they learn that 10 ones equals 1 ten, making mental math easier. Without this foundation, more complex math concepts later become frustrating. Even young time-travelers navigating number-land need to know how to "trade" 10 ones for a ten to move forward successfully.
The most common error is forgetting to "carry" or "regroup" the extra ten. Students will add 7 + 8 in the ones column, get 15, but then write down just the 5 and lose the 1 ten completely. Another frequent mistake is writing the regrouped 1 in the wrong spot—placing it in the ones column instead of above the tens column. Watch for students who add the regrouped 1 twice or forget to add it at all. If a child writes 24 + 18 = 312 or 24 + 18 = 32, they're either not regrouping or not adding the carried ten to the tens place.
Use real objects from home to show regrouping concretely. Give your child a pile of 27 pennies and ask them to add 16 more. Have them count all loose pennies first, then bundle every 10 pennies with a rubber band to show that 13 loose ones become 1 bundle (ten) and 3 leftover ones. Count the total bundles plus loose ones together. Repeat with different amounts 2–3 times weekly. This hands-on approach helps the brain 'see' why regrouping works before jumping to pencil-and-paper problems.