Addition
- Base-ten Sketch
- Open Number Line (Multiples of 10)
- Keep One, Break One (Single and Double Digit Numbers)
- Keep One, Break One (Double Digit Numbers)
- Expanded Form (Two Digit & Three Digit Numbers)
Introduction to Addition
- Count on using your fingers and a number line. (kindergarten)
- Count on using a number line (kindergarten)
- Add using a base ten sketch (1st grade)
- Add using an open number line (1st grade)
Adding 2-digit Numbers
- Add using the ‘Keep One, Break One,’ strategy? (1st grade)
- Add double digit numbers using the ‘Keep One, Break One,’ strategy? (1st grade)
- Add using expanded form? (1st grade)
- Add with regrouping by using a base-ten sketch? (2nd grade)
- Solve for a Missing Addend
Subtraction
Addition Tutorials
How do I count on using my fingers and a number line?
How do I count on using a number line?
How do I add using a base ten sketch?
How do I add using an open number line?
How do I add using the ‘Keep One, Break One,’ strategy?
How do I add double digit numbers using the ‘Keep One, Break One,’ strategy?
How do I add using expanded form?
How do I add with regrouping by using a base-ten sketch?
How do I add 3-digit numbers using an open number line?
How do I add 3-digit numbers using expanded form?
How do I solve for a missing addend by counting up?
Subtraction Tutorials
How do I subtract with regrouping using a base-ten sketch?
Base-ten Sketch
Open Number Line
Keep One, Break One (Single and Double Digit Numbers)
Keep One, Break One (Double Digit Numbers
Expanded Form (Two Digit & Three Digit Numbers)