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Instructional Video

Math Mammoth: Mental Addition of Two Digit Numbers

Curated by ACT

This video explains some strategies that are helpful for adding two-digit numbers in your head. [8:00]

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CCSS: Adaptable
Concepts
addition strategies, mental math, place value, addition
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Additional Tags
add 2-digit numbers, decompose numbers, 2.nbt.a.5 add/subtract, math mammoth (youtube), math mammoth: mental addition of two-digit numbers, mental mathematics
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Classroom Considerations
  • This video is hosted on YouTube