12 + 3 = ?, 11+ 6 = ?, 15 + 2 = ?, 11 + 4 = ?, 13 + 6 = ?, 12 + 2 = ?, 14 + 3 = ?, 11 + 4 = ?, 15 + 5 = ?, 16 + 2 = ?, 14 + 4 = ?, 12 + 5 = ?, 13 + 3 = ?, 18 + 2 = ?, 19 + 1 = ?, 15 + 3 = ?, 12 + 6 = ?, 13 + 5 = ?, 12 + 8 = ?, 11 + 7 = ?.

Double Digit Addition - Up to 20

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