Adding and Subtracting within 20 Using Doubles

This video tutorial teaches how to add and subtract within 20 using doubles. It begins with an introduction to doubles and their importance in simplifying addition and subtraction. The video reviews basic doubles facts and explains fact families, showing how addition and subtraction are related. It demonstrates how to apply doubles in addition, addresses common misunderstandings, and introduces advanced techniques for using doubles. The lesson concludes with a summary of the key points covered.

What are doubles facts and how can they help in addition?

Explain how to use fact families with the numbers 7, 5, and 12.

How can you visualize the addition of 8 plus 9 using doubles?

What is a common misunderstanding students have when using doubles plus 1?

Describe how to add 8 plus 6 using doubles.

How can thinking about addition help when subtracting, for example, 14 minus 7?

What strategies can be used to solve 13 minus 6 using doubles?