Doubles in addition are when you add the same one-digit number to itself. Doubles facts help us solve addition quickly and are building blocks for other strategies.
When both addends are the same number, the problem is a doubles fact.
A doubles problem has two of the same one-digit number with a plus sign (+) between them. The answer is always an even number, except for 1 + 1 = 2.
If the two numbers are the same, you know it is a doubles fact.
Learning doubles facts helps you solve other addition problems faster. Doubles are easy to remember and can be used to solve near doubles (like 6 + 7).
Remembering your doubles facts makes adding quicker and helps with mental math.
Doubles often appear in real-life situations. Use what you know about doubles to solve them.
Think: “Am I adding the same number to itself?” If yes, it’s a doubles fact.