re: (Not Common Core)-- Why are they teaching math this way?

quote:

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Weekday the frick is a doubles fact? Or as
A doubles plus one fact?

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6+6 = 12

So 6+? = 12

Similar to doubles plus 1

6+7 = 13

So 6+? = 13

Addend and subtracthends are just missing number that you have to add or subtract to complete an equation.