{ "item_title" : "Number pyramids - addition and substraction", "item_author" : [" Cameron MC Sweet "], "item_description" : "If you want to Improve your child's success in class with lots of addition and subtraction practice Take this pyramid math puzzle challenge and let him figure out the missing numbers in each of the 150 pyramids25 pyramids with three levels25 pyramids with four levels50 pyramids with six levels50 pyramids with seven levelsThe principle is simple, you have to add two adjacent boxes (side by side) and the sum will correspond to the box above.♥ 150 pyramids♥ Dimensions: 8.5 x 0.17 x 11 inches♥ Paperback: 73 pages", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/9/79/872/159/9798721597787_b.jpg", "price_data" : { "retail_price" : "5.99", "online_price" : "5.99", "our_price" : "5.99", "club_price" : "5.99", "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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