2.用简便方法计算下面各题
0 159994 160002 160008 160012 160018 160020 160024 160030 160032 160038 160044 160048 160050 160054 160060 160062 160068 160072 160074 160078 160080 160084 160086 160088 160089 160090 160092 160093 160094 160096 160098 160102 160104 160108 160110 160114 160120 160122 160128 160132 160134 160138 160144 160150 160152 160158 160162 160164 160170 160174 160180 160188 199269
234+200+800 | 26+(59+74) | 350+195+105+850 | 432-123-77 |
435-49-11 | 978-452-348 | 721-303 |