绘画笔|绘画颜料|绘画工具|纸张系列|办公用品|学生文具
商品编码：2092820
商品编码：2090854/2090851/2090855/2090853
商品编码：2092821
商品编码：2I90852
商品编码：708-FU00202
商品编码：LER9280
商品编码：TH001
商品编码：F5V4800
商品编码：600000/600100/600200
Using the Subtraction Strip Board, the child practices the equations of the subtraction tables 1-18. Natural wooden strips corresponding in length to the squares 1-18 are used to indicate the number to subtract from (minuend) and 1 set of blue strips used to subtract with (subtrahend). A set of red strips is included for further explorations. The 2 sets of strips are stored in hardwood boxes.
