Recognise and use structures in number recognition (e.g. 1000 as 10 H or as 100 T). Use the structure of the decimal system (bundling, place...
in 10 Montessori colours (100 pcs)
Coloured RE-Wood® slide rules with milled divisions (Cuisinaires and Dienes system combined).
10 ones red, 10 twos green, 10 threes pink, 10 fours yellow, 10 fives light blue, 10 sixes purple, 10 sevens white, 10 eights brown, 10 nines blue, 10 tens gold.
Packed in cardboard box with instructions.