Doubles Facts

The video tutorial introduces the concept of double facts in math, using the analogy of a double rainbow. It explains how double facts involve adding two identical numbers, such as 4 + 4. The tutorial provides examples using paper airplanes to demonstrate the concept. It then introduces the double plus one strategy, which helps add numbers that are adjacent on a number line. This strategy is explained with examples, such as adding 5 + 6 by using the double fact of 5 + 5 and then adding one. The video concludes with a review of the concepts and encourages practice.

What is a 'double s fact' in mathematics?

• Adding two different numbers

• Adding two identical numbers

• Multiplying two different numbers

• Subtracting two identical numbers

How many paper airplanes do Eric and Will make together if each makes 5?

• 20

• 15

• 10

• 5

What is the 'double s plus one' strategy used for?

• Adding numbers next to each other on a number line

• Multiplying two numbers

• Adding two identical numbers

• Subtracting two numbers

Using the 'double s plus one' strategy, what is 5 + 6?

• 10

• 13

• 11

• 12

How many bugs did Sue and Mia find together if Sue found 7 and Mia found 8?

• 15

• 17

• 14

• 16

If you have 9 pet fish and get 8 more, how many do you have in total using the 'double s plus one' strategy?

• 16

• 18

• 17

• 19

What should you do first when using the 'double s plus one' strategy?

• Add the larger number first

• Find the double s fact of the smaller number

• Subtract one from the larger number

• Multiply the numbers