Fun with Doubles Facts

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What is a 'doubles fact' in addition?
A doubles fact is when you add a number to itself, like \(3 + 3\) or \(5 + 5\).
$$ 1 + 1 = ? $$
$$ 1 + 1 = 2 $$
$$ 2 + 2 = ? $$
$$ 2 + 2 = 4 $$
$$ 3 + 3 = ? $$
$$ 3 + 3 = 6 $$
$$ 4 + 4 = ? $$
$$ 4 + 4 = 8 $$
$$ 5 + 5 = ? $$
$$ 5 + 5 = 10 $$
$$ 6 + 6 = ? $$
$$ 6 + 6 = 12 $$
$$ 7 + 7 = ? $$
$$ 7 + 7 = 14 $$
$$ 8 + 8 = ? $$
$$ 8 + 8 = 16 $$
$$ 9 + 9 = ? $$
$$ 9 + 9 = 18 $$
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