Adding and Subtracting within 20 Using Doubles

This video tutorial teaches how to add and subtract within 20 using doubles. It begins with an introduction to doubles and their importance in simplifying addition and subtraction. The video reviews basic doubles facts and explains fact families, showing how addition and subtraction are related. It demonstrates how to apply doubles in addition, addresses common misunderstandings, and introduces advanced techniques for using doubles. The lesson concludes with a summary of the key points covered.

What is the result of doubling the number 4?

• 6

• 12

• 8

• 10

Which of the following is a correct fact family for the numbers 7, 5, and 12?

• 7 + 5 = 13

• 5 + 7 = 12

• 12 - 5 = 8

• 7 - 5 = 2

If you know that 8 + 8 = 16, what is 8 + 9?

• 17

• 18

• 16

• 15

When using doubles plus one, what is the sum of 5 + 4?

• 10

• 8

• 9

• 11

How can you use doubles to find the sum of 8 + 6?

• Double 8 and add 2

• Double 6 and add 2

• Double 5 and add 3

• Double 7 and add 1

What is the result of subtracting 7 from 14 using doubles?

• 6

• 5

• 7

• 8

If 6 + 6 equals 12, what is 13 minus 6?

• 8

• 6

• 7

• 5