Adding Numbers within 100 Using an Open Number Line

The video tutorial teaches how to add numbers within 100 using an open number line. It begins with an introduction to the concept, followed by a review of making 10 and skip counting by 10s. The tutorial then demonstrates how to use an open number line for addition, addressing common misunderstandings such as place value errors. Finally, it provides examples of adding numbers using this method, emphasizing the importance of decomposing numbers to reach friendly numbers.

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