问题
解答题
257-101-102.
答案
257-(100+1)-(100+2),
=257-100-1-100-2,
=257-(100+100)-(1+2),
=257-200-3,
=57-3,
=54.
257-101-102.
257-(100+1)-(100+2),
=257-100-1-100-2,
=257-(100+100)-(1+2),
=257-200-3,
=57-3,
=54.