9693 - Number Crunchers Subtraction 7 - 10
38 bone shaped 'crunchers' with subtraction sums 7 to 10. The plastic slider can easily be moved to conceal the result, the first or second part of the sum or even the symbol.
38 bone shaped 'crunchers' with subtraction sums 7 to 10. The plastic slider can easily be moved to conceal the result, the first or second part of the sum or even the symbol.