2 digit by 2 digit addition

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krista.jones

Updated 2 months ago

1. Word cloud
120 seconds
What is 6 + 7?
2. Slide
60 seconds
2 digit by 2 digit addition is a mathematical operation that involves two numbers with two digits each. The result of the addition will be a number with three or four digits. It involves regrouping, carrying and borrowing numbers.
2 Digit by 2 Digit Addition
3. Slide
60 seconds
Regrouping: The process of exchanging units in a number for more tens or hundreds. Carrying: A process where the number of tens or hundreds from one column is added to the next column. Borrowing: The process of exchanging units from one column to another column in order to subtract.
Concepts:
4. Slide
60 seconds
2 digit by 2 digit addition has been around for centuries. The ancient Egyptians used this type of addition in their math calculations. The most common use of 2 digit by 2 digit addition is in everyday banking transactions!
Fun facts:
5. Open question
660 seconds
Work together in pairs: Describe how you felt when you solved the 2 digit by 2 digit addition problems. Explain what strategies you used and why.
6. Open question
660 seconds
Work together in pairs: What was the most difficult part about solving 2 digit by 2 digit addition problems?
7. Drawings
450 seconds
Brain break: Draw a picture of a robot that is a firefighter, and it's riding a unicycle!
8. Poll
300 seconds
9. Slide
300 seconds
Add the numbers in the ones column Carry any 10's Add the numbers in the 10s column.
10. Drawings
450 seconds
Solve 15 + 21 =
11. Drawings
450 seconds
Solve 28+ 12=
12. Drawings
450 seconds
Solve 43+ 15 =
13. Open question
210 seconds