Examine an approach to adding measures of various units. An instructor demonstrates a horizontal approach to adding mixed measures by borrowing from the larger measures. The examples shown include time and length.

Concepts

units of length, units of measurement, basic operations

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Additional Tags

math

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Instructional Ideas

• Incorporate the video lesson as an introduction to unit conversions
• Allow time for individuals to practice after watching the video

Classroom Considerations

• Requires an understanding of simple unit conversions

• This video is hosted on YouTube

Pros

• The horizontal method uses an approach similar to the algorithm for adding and subtracting large numbers

Cons

• Does not relate the problems to a contextual situation

Common Core

5.MD.A.1