The Mortensen Math Triangle Kit is ideal for many k-12 math activities. The kit contains one each of the unit bars 1-9 and a 10 bar.
Anna's Math Page – Mortensen Math and More
explore and discover Mortensen More Than Math with Anna and start building math fluency one block at a time
Anna, is it necessary if you have combo kit?
No you don’t need the Triangle Kit if you have the Combo Kit. It has it’s purpose but it is more of an extra than a necessity.