2007×2007/2008七-1002×(-1003/1004)简便方法计算应该是2007×2007/2008-1002×(-1003/1004

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/14 11:18:26

2007×2007/2008七-1002×(-1003/1004)简便方法计算应该是2007×2007/2008-1002×(-1003/1004
2007×2007/2008七-1002×(-1003/1004)简便方法计算
应该是2007×2007/2008-1002×(-1003/1004

2007×2007/2008七-1002×(-1003/1004)简便方法计算应该是2007×2007/2008-1002×(-1003/1004
2007×2007/2008-1002×(-1003/1004)
=2007*2007/2008+1002*1003/1004
=2007*(1-1/2008)+1002*(1-1/1004)
=2007-2007/2008+1002-1002/2004
=3009-(2007+2004)/2008
=3009-4015/2008
=3007又5/2008