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Math – Addition with Regrouping

Math · CCSS: 3.NBT.A.2 · Level 3 · Worksheet 2 of 5
Level 3 ⭐⭐⭐
Practice SetsSet 1Set 2Set 3Set 4Set 5Set 6Set 7Set 8Set 9Set 10
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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:
Problem Ones (+ carry?) Tens Answer
18 + 14
36 + 27
45 + 38
2 Practice: Does it Need Regrouping?
🤔 First decide: does this problem need regrouping? Then solve.
Problem Regrouping? (Y/N) Answer
23 + 14
37 + 25
41 + 38
54 + 16
29 + 33
46 + 27
3 Word Problems with Regrouping
📝 Solve each word problem. Show your work!
Problem Equation Answer
A class collected 28 cans on Monday and 35 cans on Tuesday. How many total?
Jake read 19 pages before lunch and 24 pages after. How many pages total?
There are 47 red marbles and 36 blue marbles. How many marbles are there in all?
4 Challenge: Three Addends
🏆 Add three numbers together. You may need to regroup more than once!
Problem Answer
15 + 18 + 12 =
24 + 19 + 27 =
33 + 28 + 14 =
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:

⭐ Great job with math today!
Math · Level 3 · Worksheet 2
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