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.
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?
What is the sum of 22 + 27?
What is the sum of 28 + 29?
What is the sum of 16 + 24?
What is the sum of 30 + 25?
What is the sum of 33 + 18?
Draw a picture of a two headed dragon wearing a hat and playing a saxophone!