问题
填空题
233除以9的余数是______.
答案
233=811=(9-1)11
=C110911+C111910(-1)+…+C11109+C1111(-1)11
=C110911+C111910(-1)+…+C11109-1
∴233除以9的余数是8
故答案为8
233除以9的余数是______.
233=811=(9-1)11
=C110911+C111910(-1)+…+C11109+C1111(-1)11
=C110911+C111910(-1)+…+C11109-1
∴233除以9的余数是8
故答案为8