Addition and subtraction using a traditional algorithm and other solutions.
Supporting Notes on development of number sense, place value, unitizing and more ...
- Whole number sense
- Place value ... notice unitizing
- Development of addition & subtraction
- Suggestons to create sequences to teach strategies to solve multi digit addition and subtraction
- Memory: learning basic facts & algorithms - getting learners to slow down & think how to proceed
Focus questions:
- Notice what number each chooses to start with.
- How do each of their different strategies fit with the development of number value, place value, and addition?
- What would be confident that each understands and doesn't?
- What activities would you recommend for their continual learning?
Base 10 number system summary sheet:
Addition & subtraction
Use paper and pencil or manipulatives to solve two digit problems and explain how they solved it.
Video 1 two digit subtraction using a traditional algorithm. (1:11)
Video 2 two digit subtraction using a traditional algorithm, manipulatives, and 100 chart ... (5:43)
Video 3 three digit addition student invented algorithm and base ten blocks ... (7:21)
Supporting Notes on development of number sense, place value, unitizing and more ...
- Whole number sense
- Place value ... notice unitizing
- Development of addition & subtraction
- Suggestons to create sequences to teach strategies to solve multi digit addition and subtraction
- Memory: learning basic facts & algorithms - getting learners to slow down & think how to proceed