Make teaching 2-digit and 3-digit addition and subtraction with regrouping engaging, hands-on, and easy to plan with 2nd Grade Magic of Math Unit 4: Addition & Subtraction with Regrouping!

This comprehensive 4-week math unit includes 20 days of lessons and activities that help students build confidence with multi-digit addition and subtraction. Students move beyond simply memorizing steps as they use place value models, hands-on activities, visual strategies, games, and problem-solving to develop a strong understanding of regrouping.

Each day includes ready-to-use instruction and practice, making it easy to teach the skills while keeping students actively involved in the learning.

Skills Covered

Students will practice:

• 2-digit addition with regrouping
• 3-digit addition with regrouping
• 2-digit subtraction with regrouping
• 3-digit subtraction with regrouping
• Using place value to understand regrouping
• Solving addition and subtraction problems vertically
• Determining when regrouping is needed
• Solving and sorting addition and subtraction problems
• Solving word problems
• Solving multi-step word problems
• Applying addition and subtraction strategies to problem-solving

4 Weeks of Math Instruction

Week 1: 2-Digit Addition with Regrouping

Students build an understanding of 2-digit addition with regrouping using place value strategies, models, and hands-on practice. Students learn when regrouping is necessary and apply their understanding to solve addition problems accurately.

Week 2: 3-Digit Addition with Regrouping

Students extend their addition skills to 3-digit numbers. They practice regrouping across place values and apply their addition strategies to more complex problems, including multi-step word problems.

Week 3: 2-Digit Subtraction with Regrouping

Students develop a conceptual understanding of 2-digit subtraction with regrouping. Visual models, interactive lessons, and repeated practice help students understand when and why regrouping is needed.

Week 4: 3-Digit Subtraction with Regrouping

Students extend their understanding to 3-digit subtraction with regrouping and apply their skills to increasingly complex problems. Students also practice using subtraction to solve multi-step word problems.

What's Included

• 20 days of detailed lesson plans
• Daily mini-lessons
• Daily word problems
• Hands-on math activities
• Partner games and activities
• Independent student practice
• Interactive learning activities
• Vocabulary cards
• I Can statements
• Printable math tools and visual supports
• Practice with word problems and multi-step problems

The unit combines explicit instruction, hands-on learning, partner practice, and independent application so students have multiple opportunities to develop and strengthen their addition and subtraction skills.

Whether you're using Magic of Math as your primary curriculum or supplementing your existing math program, Unit 4 provides the instruction and practice needed to help second graders develop confidence with multi-digit addition and subtraction with regrouping.

Standards: Aligned to Common Core Math Standards and Texas TEKS.