简便计算,难难难难难难难难难难!10234+9999+9998+9997
问题描述:
简便计算,难难难难难难难难难难!10234+9999+9998+9997
答
10234+9999+9998+9997
=10234+(10000-1)+(10000-2)+(10000-3)
=10234+10000-1+10000-2+10000-3
=(10234+10000+10000+10000)-(1+2+3)
=40234-6
=40228