{ "item_title" : "Mathematics teaching-learning process", "item_author" : [" Anny Quintana Portal", "Gretel Dorta Preciado", "Yoidel Martínez Morales "], "item_description" : "The proposed system of activities helps the development of calculus skills in the basic addition exercises with surplus in third grade students. It is necessary to improve the quality of the teaching-learning process of mathematics in elementary school. The diagnosis carried out revealed that the greatest difficulties are: lack of good memorization, skills, speed and accuracy.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/6/20/824/061/6208240611_b.jpg", "price_data" : { "retail_price" : "48.00", "online_price" : "48.00", "our_price" : "48.00", "club_price" : "48.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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