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Addition and subtraction within 1000 (K-A)
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Strategies for adding 2- and 3-digit numbers (K-A)
Strategies for adding 2- and 3-digit numbers (K-A)
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Lecture
Course
Institute
Instructor
Discipline
1
Adding and subtracting on number line (K-A)
Strategies for adding 2- and 3-digit numbers (K-A)
Khan Academy
Basic and Health Sciences
2
Addition using groups of 10 and 100 (K-A)
Strategies for adding 2- and 3-digit numbers (K-A)
Khan Academy
Basic and Health Sciences
3
Breaking apart 3-digit addition problems (K-A)
Strategies for adding 2- and 3-digit numbers (K-A)
Khan Academy
Basic and Health Sciences
4
Solving 3-digit addition in your head (K-A)
Strategies for adding 2- and 3-digit numbers (K-A)
Khan Academy
Basic and Health Sciences