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This Addition With Regrouping drill has 40 problems for Grade 2. Young Athletes theme. Answer key included.
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Max scored 28 goals yesterday and 15 today! He must add them before the trophy ceremony starts.
Standard: CCSS.MATH.2.NBT.B.5
Addition with regrouping is a critical bridge in your second grader's math journey, marking the shift from single-digit facts to real problem-solving with two-digit numbers. At ages 7–8, children's brains are ready to understand that 10 ones can become 1 ten—a concept that feels almost magical to them but builds the foundation for all future multiplication, division, and algebra. This skill directly connects to everyday situations: calculating total points in a sports game, combining coins to buy lunch, or figuring out how many crayons two friends have together. When students master regrouping, they develop flexible thinking about numbers and gain confidence tackling larger numbers. The neural pathways they're building right now for "carrying the one" will serve them throughout elementary math and beyond. This worksheet helps cement that understanding through focused, repetitive practice with problems specifically designed for this developmental stage.
The most common error is forgetting to add the regrouped ten to the tens column—students add 25 + 17, get 12 in the ones place, write down 2, but then forget they have 1 extra ten waiting to be added to 2 + 1. Watch for answers like 312 instead of 42. Another frequent mistake is regrouping when it isn't needed; some students will regroup 14 + 23 and try to carry over, creating confusion. You'll spot this pattern when a child hesitates before writing an answer or writes multiple numbers in one box. Ask them to show you their tens and ones using manipulatives like base-ten blocks to reveal where the thinking breaks down.
Create a "scoreboard" activity at home using a sport your child enjoys. Write down two athletes' point totals from yesterday's game (like 16 and 25 points), then ask your child to find the combined total—this real-world context makes regrouping feel purposeful rather than abstract. Use actual dice or cards to generate two two-digit numbers, solve together, then let them explain why they "made a new ten" and show the step with drawings or blocks. Rotate who picks the sport each week to keep it fresh.