加法口诀

１＋１＝２  ２＋１＝３  ３＋１＝４  ４＋１＝５  ５＋１＝６  ６＋１＝７  ７＋１＝８  ８＋１＝９ 　９＋１＝１０
１＋２＝３  ２＋２＝４  ３＋２＝５  ４＋２＝６  ５＋２＝７  ６＋２＝８  ７＋２＝９  ８＋２＝１０
１＋３＝４  ２＋３＝５  ３＋３＝６  ４＋３＝７  ５＋３＝８  ６＋３＝９  ７＋３＝１０
１＋４＝５  ２＋４＝６  ３＋４＝７  ４＋４＝８  ５＋４＝９  ６＋４＝１０
１＋５＝６  ２＋５＝７  ３＋５＝８  ４＋５＝９  ５＋５＝１０
１＋６＝７  ２＋６＝８  ３＋６＝９  ４＋６＝１０
１＋７＝８  ２＋７＝９  ３＋７＝１０
１＋８＝９  ２＋８＝１０
１＋９＝１０