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 two ways to reinforce skills. Complete tables feature all numbers from 0 to 12. Answers on the back allow self-checking. Students will delight in mastering new skills. No-see-through cards have quick-sorting, rounded corners. Sturdy flash cards come in a storage box and are ideal for teaching ages 6 and up.