用简便方法计算778+57+243-178

用简便方法计算778+57+243-178
2025-04-13 14:43:52
推荐回答(2个)
回答1:

用简便方法计算
778+57+243-178
=(778-178)+(57+243)
=600+300
=900

回答2:

778+57+247-178
=(778-178)+(57+243)
=600+300
=900