About

What is the sum of 12 + 12? In this movie, you’ll learn that a doubles fact is a number sentence where two of the same numbers are added together. A doubles fact has the same addend. Find out how memorizing your doubles can help you add and subtract much faster. Discover how to solve math problems in more than one way, and how you can use addition or subtraction to find the sum. You’ll also learn how you can use number triangles to help you solve problems and how to solve doubles-plus-one and doubles-minus one facts.