{"product_id":"equivalent-operation-puzzles","title":"Equivalent Operation Puzzles","description":"Practice addition and subtraction fluency with these equivalent operation puzzles. Develops skills in mental math, decomposing numbers, algebraic thinking, and word problems. Each of these self-checking puzzles has 7 pieces - a hexagon piece displaying a number from 1-20, and 6 trapezoid pieces that display equivalent addition and subtraction problems. The set includes 20 puzzles; an orange set from 1-10 and a blue set from 11-20, plus a self-check container that students flip over for added fun! 140 pieces total, plus and additional 40 interchangeable pieces in French. Ages 3+. Grades 1+","brand":"SI Manufacturing","offers":[{"title":"Default Title","offer_id":49961301344533,"sku":"SI14633","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/14633.jpg?v=1781067132","url":"https:\/\/unitedsupplycorp.com\/products\/equivalent-operation-puzzles","provider":"United Supply Corp.","version":"1.0","type":"link"}