Understanding Doubles in Addition

The video tutorial explains how to use doubles to add near doubles fluently. It begins with an introduction to key vocabulary terms such as addends and sums. The concept of doubles facts is explained, where addends are the same, and how these can be used to add near doubles quickly. Examples using four plus five and seven plus six demonstrate the method. The video concludes with a review of basic doubles facts and a summary of the technique.

What is the main topic introduced in the video?

• Subtracting numbers quickly

• Using doubles to add near doubles fluently

• Using multiplication to solve problems

• Dividing numbers efficiently

In an addition sentence, what are the numbers being added called?

• Quotients

• Addends

• Products

• Sums

What is a doubles fact in addition?

• An addition problem where the addends are different

• An addition problem where the addends are the same

• A subtraction problem with equal numbers

• A multiplication problem with identical factors

How can you identify a doubles fact?

• If the addends are different

• If the sum is a prime number

• If the addends are the same

• If the sum is an even number

What is the first step in using doubles to add near doubles?

• Double the smaller addend

• Double the larger addend

• Add both numbers directly

• Subtract the larger number from the smaller one

In the example of 4 + 5, what is the doubles fact used?

• 5 + 5

• 4 + 4

• 3 + 3

• 6 + 6

How many dots are placed in the ten frame for the first addend in 4 + 5?

• 6 dots

• 4 dots

• 3 dots

• 5 dots

What is the sum of 4 and 5 using the doubles fact method?

• 11

• 10

• 9

• 8

In the example of 7 + 6, what doubles fact is used?

• 5 + 5

• 7 + 7

• 6 + 6

• 8 + 8

How many dots are placed in the ten frame for the first addend in 7 + 6?

• 5 dots

• 6 dots

• 7 dots

• 8 dots