https://yousefabad.salamsch.com/pschool/wp-content/uploads/2019/01/riazi-dovom-ebtedaii.jpg1071953bahareh tanhahttp://yousefabad.salamsch.com/pschool/wp-content/uploads/2021/01/IMG_20210117_230820_665.pngbahareh tanha2018-11-21 11:00:432019-01-16 12:43:54آموزش جمع و تفریق فرآیندی با ابزار