3-5/8 x 5-1/4 in. K-3rd grade. Reward stickers included. Subtraction Flashcards help your child learn to subtract numbers and improve memorization skills. Fun and educational, these cards offer children a convenient way to practice subtraction. Contents include: 1 parent instruction card; 52 subtraction equation (0-12); 2 multisensory activity cards; reward stickers. Activities - are hands-on; incorporate movement; can be used repeatedly to reinforce subtraction skills. Made in China.