Addition & Subtraction
(range of one hundred)
Goal - To be able to quickly add, subtract, and break apart numbers efficiently using non counting strategies
What to teach?
- 2-digit + 1-digit (within decade)
- 2-digit - 1-digit (within decade)
- 2-digit + 1-digit (crossing over decade)
- 2-digit - 1-digit (crossing over decade)
- 2-digit + 2-digit (using jump or split strategies)
- 2-digit - 2-digit (split strategy)
- 2-digit - 2-digit (using jump or count up strategies)
Printable Number Lines https://www.helpingwithmath.com/resources/oth_number_lines.htm