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Exploring Addition Strategies with Doubles - Lesson Plan

In this exciting math adventure, students will learn the "Doubles and Doubles +1/1" strategy for addition. They will practice doubling numbers within 20, use known double facts to derive new facts by adding 1, and learn to add two consecutive numbers by using the doubles minus 1 strategy. Through engaging tasks, visual aids, and practice problems, students will develop their mental math skills and become more confident in solving addition problems efficiently.

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The "Doubles and Doubles +1/1" strategy for addition involves adding a number twice or adding two consecutive numbers. It helps simplify addition problems by utilizing known double facts or subtracting 1 from a larger number.

The "Doubles +1" strategy involves using known double facts to derive new facts by adding 1 to them. For example, if a student knows that 4+4=8, they can use this fact to quickly solve 4+5 by adding 1 to the known double: 8+1=9.

The doubles minus 1 strategy is used to add any two consecutive numbers. Students pick the larger number and subtract 1 to find the result. For example, to solve 6+7, a student would pick the larger number (7) and subtract 1: 7-1=6. Then they add the other number (6) to get the final answer: 6+6=12.

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