Max Conquers the Field Day Relay: Addition Challenge!

About this Grade 2 Addition With Regrouping Drill

Addition with regrouping is a critical bridge skill that moves second graders beyond simple, single-digit facts into the world of two-digit numbers. At age 7 and 8, children are developing the mental flexibility to break numbers apart and put them back together—a cognitive leap that feels magical when it clicks. When your child adds 15 + 17, they're learning to regroup 10 ones into 1 ten, a concept that builds the foundation for all future multiplication, division, and even algebra. This skill appears constantly in real life: calculating allowance, combining toy collections, or figuring out how many snacks are needed for a field day. Mastering regrouping now prevents confusion later and builds genuine number sense rather than mere memorization. Students who practice this skill develop confidence with larger numbers and stronger problem-solving strategies.

What your student will practice

• Regroup 10 ones as 1 ten when adding two-digit numbers
• Write regrouped numbers correctly in tens and ones places
• Add two-digit numbers with sums up to 100 using regrouping
• Show regrouping work clearly to demonstrate mathematical thinking

Common mistakes to watch for

Many second graders forget to regroup altogether or regroup incorrectly by carrying the wrong digit. Watch for answers like 312 when adding 15 + 17 (they added 1 + 1 = 2 in the tens place but wrote both digits side-by-side). Another frequent error is adding the ones column correctly but forgetting to add the regrouped ten to the tens column. Students might also write the regrouped ten in the wrong place or lose track of it entirely. If you see sloppy column work or numbers floating around without organization, that's often where regrouping confusion hides.