17 + 9 = - 26, 16 + 8 = - 24, 63 - 7 = - 56, 26 + 18 = - 44, 33 - 16 = - 17, 14 + 9 = - 23, 27 - 19 = - 8, 13 + 18 = - 31,

Математика. Примеры.

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?