45 Golden Bead Units

45 Golden Bead Units.

Materials

45 of 100 gold beads

handmade, good surface treatment

the white box

Purposes

1Exercise to combine 1, 2 ... 9; 10, 20 ... 90; 100, 200 ... 900; 1000, 2000 ... 9000 figures with the amount

2Strengthen the concept of number; prepare for the learning of arithmetic sequences.