Addition and subtraction within 100 | Early Math | Khan Academy (English)

   Friday, June 04, 2021   

Starting a new Lecture Notes Series on Addition and subtraction within 100 | Early Math | Khan Academy

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Addition and subtraction within 100 | Early Math | Khan Academy
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Lecture Description of this above Topic:

Lecture 1: Fence posts for horses

Lecture 2: Subtracting ten or one hundred

Lecture 3: Understanding place value when adding ones

Lecture 4: Addition with regrouping

Lecture 5: Understanding place value while adding tens

Lecture 6: Adding by getting to group of 10 first

Lecture 7: Adding and subtracting on number line word problems

Lecture 8: Understanding place value while subtracting ones

Lecture 9: Adding two-digit numbers without regrouping

Lecture 10: Addition using groups of 10 intro

Lecture 11: Starfish rulers

Lecture 12: Adding hundreds, tens, and ones

Lecture 13: Skip counting by 5 example

Lecture 14: Using crayons

Lecture 15: Understanding place value when subtracting tens

Lecture 16: Subtracting with regrouping (borrowing)

Lecture 17: Repeated addition example

Lecture 18: More word problems

Lecture 19: Spots on a die

Lecture 20: Fewer word problems

Lecture 21: Counting by tens examples

Lecture 22: Losing tennis balls

Lecture 23: Skip counting by 100 example

Lecture 24: Subtracting two digit numbers without regrouping

Lecture 25: Subtract tens exercise

Lecture 26: Adding ten or one hundred

Lecture 27: Snow on Friday

Lecture 28: Subtracting hundreds, tens, and ones