Amazon
19 calculating sticks for adding and subtracting All sizes from 1 to 10 are included Also very suitable for illustrating proportions Made from durable wood Dimensions: 17 x 17 x 2 cm
19 calculating sticks for adding and subtracting All sizes from 1 to 10 are included Also very suitable for illustrating proportions Made from durable wood Dimensions: 17 x 17 x 2 cm