Make a Ten and Carry: Adding Two-Digit Numbers with Regrouping

Learning Objectives

• Add two-digit numbers within 100 when the ones need regrouping.
• Explain regrouping as trading 10 ones for 1 ten using base-ten blocks.
• Estimate to check that an answer is reasonable and solve addition word problems.

How to Use This Resource

• Show the slides and model 37 + 25 with base-ten blocks before showing the written method.
• Use the flashcards for quick vocabulary practice, then complete the worksheet.
• Use the quiz to check learning and send the homework home; answers are in the answer keys.

Classroom Activity Ideas

• Trading game: roll two dice, take that many ones cubes, and trade ten ones for a ten rod whenever you can. First to 100 wins.
• Error detective: show worked sums where the carried 1 was forgotten; pairs find and fix the mistake.
• Class store: price items between 15 and 49 cents and find the cost of buying two.

Differentiation

Support: use base-ten blocks and a place value mat for every question. Challenge: add three two-digit numbers and solve two-step problems.

Assessment

The worksheet and quiz check adding with regrouping (answer keys included). Use the rubric for explanations and word problems.

Teacher Tips

Always start with the ones. Ask "Do we have ten or more ones? Then we trade!" Saying the trade aloud stops children from writing 12 in the ones column.

What's Included

• 10-page printable PDF lesson pack: teacher lesson plan with timings, materials and differentiation
• Key vocabulary list (7 words with meanings and examples)
• Student worksheet (5 activities)
• Quiz / assessment (3 parts)
• Homework practice page
• Printable flashcards: 7 A5 picture cards (separate PDF)
• Assessment rubric (4 levels)
• Lesson slides (editable PowerPoint)
• Editable Word version of all student pages
• Complete answer key (also as a separate PDF)

Additional Files

• Lesson Slides (PPTX)
• Editable Student Pages and Lesson Plan (DOCX)
• A5 Flashcards (PDF)
• Answer Key (PDF)

Teacher Reviews