Numbercus Extra is for people who have become familiar with the Numbercus App and feel that they still need more practice with fundamental aspect of integer numbers.

Numbercus Extra provides the following exercises:
-see a random decimal number then try to match it with a bead number
-create a bead number between 0 and 999,999,999 then hear this number
-hear a random number then try to match it with bead number
-see a random quantity of squares then try to match this with a bead number
-create a bead number up to 359 and see it as an angle
-see an angle then try to match it with a bead number
-create a fraction with a denominator of up to 9 and see a pie chart of it.

Numbers are spoken in your iPad's language.

Numbercus Extra uses standard bead notation of a nine bead abacus.