The Numbers Microworld is for building numbers by composing digits.
In the Numbers Microworld it is possible to produce, one at a time, digits from 0 to 9 and the comma (by dragging the numbers, or the comma, from the menu), to move the numbers produced on the screen, to compose (by means of the function “paste”) a multi-digit number placing the numbers side by side, to break up a previously composed number into digits, to erase the numbers produced one by one.

The constructed numbers can be copied to be pasted on the Solution Sheet.