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.
Add a single digit to a teen with totals up to 20.
Add a single digit to a teen with totals up to 20.