1. Slide

60 seconds

In the early 1900s, teachers used to have students memorize addition facts. The largest two-digit number is 99, and the smallest two-digit number is 10. The most common two-digit combination is 36 - it appears in 6.3% of all two-digit additions.

Fun facts:

2. Open question

660 seconds

Work together in pairs: What strategies did you use to solve the two-digit addition problem? What did you learn from attempting to solve the problem?

3. Poll

300 seconds

What is the sum of 22 + 27?

- 49
- 57
- 50
- 48

4. Poll

300 seconds

What is the sum of 28 + 29?

- 57
- 51
- 67
- 59

5. Poll

300 seconds

What is the sum of 16 + 24?

- 40
- 36
- 44
- 48

6. Poll

300 seconds

What is the sum of 30 + 25?

- 55
- 51
- 45
- 60

7. Poll

300 seconds

What is the sum of 33 + 18?

- 50
- 51
- 41
- 55

8. Drawings

450 seconds

Draw a picture of a two headed dragon wearing a hat and playing a saxophone!

Made with ❤️ from Norway