Double facts refer to a set of addition problems in which the same number is added to itself, resulting in a sum that is equal to the multiplication of the number by 2. For example, the double fact for the number 3 is 3+3=6, and the double fact for the number 8 is 8+8=16.
Double facts are important to learn as they provide a foundation for understanding basic addition and multiplication concepts. By understanding double facts, children can quickly and easily solve more complex addition and multiplication problems. Double facts are also important for mental math, as they allow children to quickly recall basic addition and multiplication facts without having to count or use a calculator.
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