Add a single digit to a teen with totals up to 20 (Timed)
Add a single digit to a teen with totals up to 20.
Add a single digit to a teen with totals up to 20 (Timed)
Add a single digit to a teen with totals up to 20.
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Add a single digit to a teen with totals up to 20.
Add a single digit to a teen with totals up to 20.