Addition and subtraction | Arithmetic | Khan Academy (English)

   Wednesday, June 09, 2021   

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Addition and subtraction | Arithmetic | Khan Academy
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Lecture Description of this above Topic:

Lecture 1: Subtracting: Regrouping from zero

Lecture 2: Borrowing once example 2

Lecture 3: Subtracting 14 - 6

Lecture 4: Subtracting: three digit numbers and basic regrouping

Lecture 5: Adding three digit numbers with regrouping

Lecture 6: Basic addition

Lecture 7: Alternate mental subtraction method

Lecture 8: Subtracting: regrouping twice

Lecture 9: Adding: why carrying works

Lecture 10: Regrouping (borrowing) twice example

Lecture 11: Subtracting: three digit numbers and regrouping

Lecture 12: Borrowing once example 1

Lecture 13: Adding three-digit numbers

Lecture 14: Basic subtraction

Lecture 15: Example: Adding two digit numbers (no carrying)

Lecture 16: Subtracting with regrouping (borrowing)

Lecture 17: Addition 4

Lecture 18: Subtraction 2

Lecture 19: Subtracting two digit numbers without regrouping