1. Lesson 3: Regrouping in Addition Ms. Jamie Scordino 3 rd Grade Math

2. Base Ten Blocks Hundred Thousand Ten One

3. Base Ten Blocks 10 ones = 1 ten 10 tens = 1 hundred

4. Base Ten Blocks 10 hundreds = 1 thousand

5. This is the number 57 Tens Ones

6. This is the number 1,325 HundredsThousands Tens Ones

7. Base Ten Blocks Show Addition + = 23 + 31 = 54

8. Base Ten Blocks Show Addition + = 49 + 33 = 7 tens 12 ones We can’t have 12 ones in the ones place.

9. Base Ten Blocks Show Addition + = 49 + 33 = 82 We can take 10 ones and make them into one ten.

10. In Math We Show This As: 49 + 33 82 9 + 3 = 12, but we can’t have more than 9 in the ones place So, we regroup. We take 10 ones and make one ten and carry that ten to the tens place.

11. Base Ten Blocks Show Addition 175 + 242

12. Base Ten Blocks Show Addition 175 + 242 417

13. Practice Problem 376 +448 824 6 + 8 = 14 REGROUP carry the ten and put the four in the ones place 1 + 7 + 4 = 12 REGROUP carry the ten and put the two in the tens place 3 + 4 + 1 = 8, 8 goes in the hundreds place

14. Your Turn Your Turn http://www.learn4good.com/games /kids/double_digits.htm http://www.learn4good.com/games /kids/double_digits.htm Thank you for a great lesson!