1. What is addition? What is subtraction?
- Intro to addition / Sal talks about what it means to add. The examples he uses are 1+1 and 2+3. / Addition need counting.
- Intro to subtraction / Sal talks about what it means to subtract.
2. Making small numbers
Making 5 / Notice here, Sal show us commutative law silently.
3. Making 10
- Getting to 10 by filling boxes / Given 10 boxes and some circle, fill up all boxes to get to 10.
- Adding to 10 / how many bananas we need to add to 3 bananas to make 10 bananas.
4. Put together, take apart
- Add and subtract: pieces of fruit
- Addition and subtraction within 10 / Sal solves addition and subtraction problems with number 10 or less.
5. Relating addition and subtraction
Sal shows the relationship between 2+3=5, 5-2=3, and 5-3=2.
6. Addition and subtraction word problems
- Addition word problems within 10 / Sal solves word problems by adding small numbers (numbers 10 or less).
- Subtraction word problems within 10 / Sal solves word problems by subtracting small numbers (numbers 10 or less).
