今日の暗算 今日の暗算(2026/9/25) 68 + 67 = ?324 − 207 = ?24 × 48 = ?925 ÷ 25 = ?47 × 98 = ?8,000 − 697 = ?51 × 49 = ?585 ÷ 5 = ?125 × 58 = ?103 × 97 = ?簡... 2026.09.05 今日の暗算今日の暗算と結果