HBS Math Support

Subtraction

Videos

1. Methods for subtracting – Khan Academy
2. Add and subtract on a number line – Khan Academy
3. Subtraction with regrouping – Khan Academy
4. Subtraction - Math Antics

Adding and subtracting on number line (video) | Khan AcademySal adds and subtracts numbers like 585 and 368 using a number line. Numbers used in these problems are less than 1000.

Methods for subtracting 3-digit numbers (video) | Khan AcademySubtract 357-156 using place value strategies.

Practice

Vocabulary

difference
regroup

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