简算:100000-(79999-7999-799-79-7)

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/02 20:49:47
简算:100000-(79999-7999-799-79-7)

简算:100000-(79999-7999-799-79-7)
简算:100000-(79999-7999-799-79-7)

简算:100000-(79999-7999-799-79-7)
100000-(79999-7999-799-79-7)
=100000-[80000-1-(8000-1)-(800-1)-(80-1)-7]
=100000-(80000-1-8000+1-800+1-80+1-7)
=100000-(80000-8000-800-80-5)
=(100000-80000)+(8000+800+80+5)
=20000+8885
=28885