9692 - Number Crunchers Subtraction 0 - 6
26 bone shaped 'crunchers' with subtraction sums 0 to 6. A plastic slider can easily be moved to conceal the result, the first or second part of the sum or even the symbol.
26 bone shaped 'crunchers' with subtraction sums 0 to 6. A plastic slider can easily be moved to conceal the result, the first or second part of the sum or even the symbol.