Exploring Double Facts Plus One in Addition

The video tutorial introduces the 'doubles plus one' strategy for addition, which is useful when one addend is one more than the other. It explains the concept using examples like 3+4 and 4+5, where you double the smaller number and add one. The tutorial progresses to more advanced examples, reinforcing the strategy. The video concludes with a recap of the method, emphasizing its utility in simplifying addition problems.

What is the result of applying the 'doubles plus one' strategy to 3 + 4?

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• 9

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What is the first step in the 'doubles plus one' strategy?

• Find the average of the two numbers

• Add one to the larger number

• Double the smaller number

• Subtract one from the sum

How do you solve 4 + 5 using the 'doubles plus one' strategy?

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What is the result of 2 + 3 using the 'doubles plus one' strategy?

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Using the 'doubles plus one' strategy, what is 3 + 4?

• 7

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What does the 'doubles plus one' strategy yield for 4 + 5?

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Applying 'doubles plus one' to 5 + 6 results in what?

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What is the outcome of 6 + 7 using 'doubles plus one'?

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Using 'doubles plus one', what is 7 + 8?

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What does 'doubles plus one' give for 8 + 9?

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