Understanding Doubles in Addition

This video tutorial teaches how to use doubles in addition and subtraction. It begins by explaining what doubles are, using simple examples like 4 plus 4 equals 8. The lesson then explores how doubles can make counting and calculations more efficient, especially when dealing with numbers close to doubles. The tutorial covers both addition and subtraction strategies, such as adding one more to a double or subtracting from a near double. The video concludes by summarizing the use of doubles in math operations.

What is the sum of 7 and 8 using the concept of doubles?

• 15

• 13

• 16

• 14

Which of the following is a doubles fact?

• 3 + 3 = 6

• 4 + 5 = 9

• 5 + 6 = 11

• 6 + 7 = 13

What is the sum of 2 and 2?

• 5

• 6

• 3

• 4

What is the sum of 1 and 1?

• 3

• 2

• 4

• 1

How can you quickly find the sum of 4 and 5 using doubles?

• Add 4 and 6

• Add 5 and 5, then subtract 1

• Add 4 and 4, then add 1

• Add 5 and 4

What is the result of 17 minus 8 using doubles?

• 7

• 8

• 9

• 10

How can doubles help in subtraction?

• By subtracting twice

• By finding a nearby doubles fact

• By using the same number twice

• By adding more numbers

If 6 plus 6 equals 12, what is 6 plus 8?

• 13

• 14

• 15

• 16

What is the result of 6 plus 7 using doubles?

• 15

• 14

• 12

• 13