Content-rich math cards do their job, teaching students new skills in a fun way. This educational aid helps students build subtraction 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. No-see-through cards with quick-sorting, rounded corners. quick-sorting, rounded corners. Details: Black & white3" x 6" (7.62cm x 15.24cm) sturdy no-see-through cards with quick-sorting, rounded corners. Reinforced box169 cardsLearning facts is easier with complete subtraction tables for 0-12 Great for test prep and reviewSelf-checking, with answers on card backsSturdy cards and storage boxAll equations from (0-0) through (12-12) presented, as are equations from (13-1) through (24-12)