Use doubles facts

Doubles facts represent adding two equal quantities, such as $4+4=8$ , and include the basic sums from $1+1$ through $10+10=20$ . Knowing these facts supports fluent addition and related subtraction within 20, helps identify equal quantities in equations and visual representations such as ten-frames or number lines, and provides a foundation for using near-doubles strategies without extending to larger-number generalizations.

Detailed Explanation: Use doubles facts

A double is when you add the same number two times. For example, $4+4$ is a double because both numbers are $4$ .

Example: Solve $6+6$

Notice that the two numbers are equal: $6$ and $6$ .
Start with $6$ .
Count on $6$ more: $7, 8, 9, 10, 11, 12$ .
So, $6+6=12$ .

The doubles fact is:

6+6=12

You can use doubles facts from $1+1=2$ through $10+10=20$ .

Learn by doing: Use doubles facts

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Addition - Whole Number - Doubles

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