1 - 15 - 14 = ?, 2 - 9 - 7 = ?, 3 - 3 + 0 = ?, 4 - 6 + ? = 10, 5 - 12 - ? = 7, 6 - 4 + 2 = ?, 7 - 18 - 11 = ?, 8 - 9 + ? = 17, 9 - 1 + 8 = ?, 10 - 13 - ? = 3, 11 - 20 - 9 = ?, 12 - 6 + 6 = ?, 13 - 9 + 4 = ?, 14 - ? - 0 = 14, 15 - 7 + 8 = ?,

Addition and subtraction within 20 (1)

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?