Addition and subtraction | 3rd Grade | Khan Academy (English)

   Saturday, July 17, 2021   

Starting a new Lecture Notes Series on Addition and subtraction | 3rd Grade | Khan Academy

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Addition and subtraction | 3rd Grade | Khan Academy
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Lecture Description of this above Topic:

Lecture 1: Subtracting: Regrouping from zero

Lecture 2: Missing number for addition and subtraction within 1000

Lecture 3: Subtracting: three digit numbers and basic regrouping

Lecture 4: Adding three digit numbers with regrouping

Lecture 5: Subtracting: regrouping twice

Lecture 6: Adding: why carrying works

Lecture 7: Subtracting: three digit numbers and regrouping

Lecture 8: Adding three-digit numbers

Lecture 9: Mental technique for subtraction without regrouping

Lecture 10: Base ten numbers