0.89+8.9+89+899+8999+89999+899999+8999999 并写出计算过程~

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/08 05:37:26

0.89+8.9+89+899+8999+89999+899999+8999999 并写出计算过程~

0.89+8.9+89+899+8999+89999+899999+8999999
=0.89+(9-0.1)+(90-1)+(900-1)+(9000-1)+(90000-1)+(900000-1)+(9000000-1)
=0.89+9+90+900+9000+90000+900000+9000000-0.1-1-1-1-1-1-1
=9999999.89-6.1
=9999993.79