1: 2 - 1 =, 3 - 2 =, 4 - 3 =, 5 - 4 =, 2: 1 + 1 =, 3 - 1 =, 4 - 2 =, 5 - 3 =, 3: 1 + 2 =, 2 + 1 =, 4 - 1 =, 5 - 2 = , 4: 1 + 3 =, 2 + 2 =, 3 + 1 =, 5 - 1 = , 5: 1 + 4 =, 2 + 3 = , 3 + 2 =, 4 + 1 =,

Sčítání a odčítání do 5 (bez nuly)

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?