{"product_id":"the-original-triangle-flash-cards-addition-subtraction-20-per-set-3-sets","title":"The Original Triangle Flash Cards - Addition \u0026 Subtraction - 20 Per Set - 3 Sets","description":"Eliminate memory overload and learn 4 math facts on each side of a card! Triangle Flash Cards teach families of facts, showing the relationship between addition and subtraction. How is 4 in one corner related to 7 and 3 in the other corners? For 2 or more players. Each card displays eight problems - four are addition and four are subtraction. Relationship between addition and subtraction facts is emphasized. Students will gain efficiency in memorizing. Cards permit individualization of drill without changing cards. A harder fact is printed on one side of a card and an easier fact is printed on the other side. Includes variations in activities. Supports state and national mathematics standards. Each set includes 20 cards and instructions. Sold as 3 identical sets of flash cards.","brand":"Learning Advantage®","offers":[{"title":"Default Title","offer_id":43701755379786,"sku":"CRE4551-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/1146\/7338\/files\/309638712.jpg?v=1781425979","url":"https:\/\/checkout.inspire.world\/es\/products\/the-original-triangle-flash-cards-addition-subtraction-20-per-set-3-sets","provider":"Inspire World","version":"1.0","type":"link"}