1. Open question

180 seconds

Can 3digit addition help us understand challenging social issues?

2. Word cloud

120 seconds

What is the answer when you add 123 + 456?

3. Slide

60 seconds

Adding 3-digit numbers is like adding 2-digit numbers, but with an extra step. Start by adding the ones column and work your way up to the hundreds column. If the number in the ones column is greater than 10, you'll need to add the leftover number to the next column.

Adding 3-Digit Numbers

4. Slide

60 seconds

Addend: The numbers that are being added together in a 3-digit addition problem. Sum: The result of adding two or more numbers together. Regrouping: When a number is too large to be added in one column, it is broken down into smaller parts and added to another column.

Concepts:

5. Slide

60 seconds

The fastest mental addition record for 3 digits is 0.22 seconds. The decimal numbers 0.1, 0.2 and 0.3 are also called tenths, hundredths, and thousandths. The number 666 is also known as the 'number of the beast'!

Did you know?

6. Open question

300 seconds

What strategies can you use to solve 3-digit addition problems?

7. Open question

300 seconds

What does it mean to regroup or borrow in 3-digit addition?

8. Open question

300 seconds

What methods have you found to be most helpful when solving 3-digit addition problems?

9. Open question

300 seconds

What challenges have you faced while learning 3-digit addition?

10. Drawings

450 seconds

Brain break: Draw a tree person with leaves for hair and walking with two bird friends in sandals!

11. Drawings

1260 seconds

Question: What is the sum of 543 + 678? Clues: • Start by identifying the hundreds place. • Add the hundreds place together. • Add the tens and ones together. In pairs: Select and solve one of the tasks: A. Draw a picture to show your work. B. Explain how you got the answer to your partner.

12. Poll

60 seconds

What is the sum of 123 and 456?

- 579
- 669
- 777
- 789

13. Poll

60 seconds

What is the sum of 234 and 567?

- 801
- 791
- 888
- 768

14. Poll

60 seconds

What is the sum of 345 and 678?

- 1023
- 1002
- 999
- 1056

15. Poll

60 seconds

What is the sum of 432,267, and 321?

- 1020
- 1012
- 1200
- 1121

16. Poll

60 seconds

What is the sum of 543,678, and 901?

- 2122
- 1444
- 1544
- 2044

17. Open question

180 seconds

Work together in pairs: Q: What is the sum of the 3-digit numbers 827 and 519?

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