This video tutorial covers the concepts of doubles plus one and doubles minus one in addition. It explains how these strategies can simplify addition problems by using known doubles facts. The video provides examples and practice problems, demonstrating how to apply these strategies effectively. It also introduces the use of an addition table and flashcards to reinforce learning. The lesson concludes with a preview of the next topic, which will focus on practicing addition strategies like counting on and using doubles.

What is the main focus of this lesson?

• Division methods

• Doubles plus one and doubles minus one

• Multiplication techniques

• Subtraction strategies

What are doubles facts?

• Multiplication sentences with the same numbers

• Subtraction sentences with different numbers

• Addition sentences with the same numbers

• Addition sentences with different numbers

How can doubles plus one help in addition?

• By subtracting one from the sum

• By adding one to a known doubles fact

• By multiplying the sum by two

• By dividing the sum by two

What is the result of using doubles minus one?

• The sum is increased by one

• The sum is halved

• The sum is decreased by one

• The sum is doubled

How can you solve 3 + 4 using doubles?

• Use 3 + 3 and add one

• Use 4 + 4 and subtract one

• Use 2 + 2 and add two

• Use 5 + 5 and subtract one

What is the sum of 6 + 7 using doubles?

• 13

• 14

• 12

• 15

How does an addition table help with doubles?

• It shows multiplication results

• It helps find sums of doubles plus one and minus one

• It displays subtraction differences

• It lists division quotients

What is a good way to memorize doubles facts?

• By only reading them

• By ignoring them

• By creating flashcards and practicing

• By writing them once

What is the benefit of practicing doubles facts?

• It makes subtraction easier

• It helps in quick addition

• It complicates multiplication

• It has no benefit