求答案，要过程，谢谢

Question

如题所述

Answer 1

⑴337-(169+137)
=337-169-137
=337-137-169
=200-169
=31
⑵579-263-237
=579-(263+237)
=579-500
=79
⑶9+99+999+9999
=(10-1)+(100-1)+(1000-1)+(10000-1)
=(10+100+1000+10000)-(1+1+1+1)
=11110-4
=11106
⑷500-653+253
=500-(653-253)
=500-400
=100

愿对你有所帮助！