Content-rich math cards do their job, teaching students new skills in a fun way. This educational aid helps students build addition skills. Equations are presented 2 ways to reinforce skills. Complete tables for all numbers 0-12. Self-checking, answers on back. Sturdy cards and storage box. Students will delight in mastering new skills. Details:Black and white3" x 6" (7.62cm x 15.24cm) no-see-through cards with quick-sorting, rounded corners169 cardsEach equation is presented two ways to reinforce addition skills for all facts 0-12Self-checking, with answers on card backsSturdy tagboard cards and reinforced cardboard storage box