Notched corners for quick organization. Large, easy to handle 6-1/4" x 3-1/4" cards. Bold, heavy type to use with large groups. Durable, thick card stock (14 pt.). Self-checking. Great for small groups, pairs, and whole class participation. Great for teaching the relationship between +/-, (e.g.: 3+1=4 on one side, 4-1=3 on the reverse). Each set includes 90 cards. Sold as 2 sets for a total of 180 cards.

• Great for teaching the relationship of +/- and multiply/divide; (Example 3+1=4 on one side, 4-1+3 on the reverse)
• Sold as 2 packs, each pack contains 90 classroom-size flash cards
• Cards measure 6.25" x 3.25"
• To familiarize children with the basic facts of addition and subtraction. Quick recall of math basics, "mental math". Application and interpretation of mathematical language for important elementary concepts. Auditory/visual association.