Doubles In Math power point explains the importance of learning doubles as a foundation for learning math facts.

Doubles in addition means both addends in an addition problem are the same. The next strategy to learn is doubles plus one. Photographs give a visual picture of doubles in every day life. All doubles are even numbers because they can be divided evenly. Doubles plus one are odd numbers because there is an odd item out.

The product also relates doubles to multiplication and division. It explains the doubles plus two strategy.