凑十法练习题。(1) 7 8 = ?(2) 6 9 = ?(3) 4 7 = ?(4) 3 8 = ?(5) 5 6 = ?
凑十法练习题。(1) 7 8 = ?(2) 6 9 = ?(3) 4 7 = ?(4) 3 8 = ?(5) 5 6 = ?
发布时间:2025-05-10 19:58:34
凑十法练习题。(1) 7 8 = ?(2) 6 9 = ?(3) 4 7 = ?(4) 3 8 = ?(5) 5 6 = ?