20 + ____ = 40 25 + ____ = 40 ____ +29 = 40 6 + ____ = 12 22 + ____ = 29 ____ + 10 = 15 25 + ____ = 31 16 + ____ = 32 13 + ____ = 20 9 + ____ = 18

Addition Missing Pieces in Equations 40 Lesson 4

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?