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Math – Addition with Regrouping

Math · CCSS: 3.NBT.A.2 · Level 3 · Worksheet 2 of 5 · Practice Set 9

Level 3 ⭐⭐⭐

1 What is Regrouping?

📦 When the ones column adds up to 10 or more, you "regroup" (carry) to the tens column.

Example: 27 + 15

Step 1: Add the ones: 7 + 5 = 12 → Write 2, carry the 1

Step 2: Add the tens: 2 + 1 + 1(carried) = 4 → Answer: 42

Try these step by step:

2 Practice: Does it Need Regrouping?

🤔 First decide: does this problem need regrouping? Then solve.

3 Word Problems with Regrouping

📝 Solve each word problem. Show your work!

Problem	Equation	Answer
Mia planted 48 carrot seeds and 44 bean seeds. How many seeds did she plant?
The bus traveled 66 miles and then 28 more miles. How many miles did it travel?
Jayden won 19 tickets and then 73 tickets at the arcade. How many tickets in all?

4 Challenge: Three Addends

🏆 Add three numbers together. You may need to regroup more than once!

5 Explain Your Thinking (SBA Practice)

Show your work and explain how you solved the problem. On the state test, you will need to explain your reasoning.

Problem: Sam has 347 stickers. He gets 285 more. How many stickers does Sam have now? Show your regrouping.

My work:

My answer:

How I know my answer is correct:

+ Bonus Math Practice

Try one extra round for Set 9.

45 + 6 =

52 - 4 =

5 × 10 =