Music › Doubles Addition Facts Backing Track Image 1 of 1 Doubles Addition Facts Backing Track $4.00 Karaoke/backing track for the Doubles Addition Facts song by Hopscotch Get notified by email when this product is in stock. Add To Cart Added! Karaoke/backing track for the Doubles Addition Facts song by Hopscotch Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More You Might Also Like Quick View Sentence Song (US) Backing Track $4.00 Quick View The Fractions Song Backing Track $4.00 Quick View 50 States and Capitals Backing Track $4.00 Quick View Count by 11s Backing Track $4.00 Quick View Write 4 (Four) Backing Track $3.00