9.75+99.75+999.75+9999.75+1=【简便运算】

9.75+99.75+999.75+9999.75+1=【简便运算】
9.75+99.75+999.75+9999.75+1=【简便运算】

9.75+99.75+999.75+9999.75+1=【简便运算】
9.75+99.75+999.75+9999.75+1
=9.75+99.75+999.75+9999.75+0.25x4
=(9.75+0.25)+(99.75+0.25)+(999.75+0.25)+(9999.75+0.25)
=10+100+1000+10000
=11110

9.75+99.75+999.75+9999.75+1
=10-0.25+100-0.25+1000-0.25+10000-0.25+1
=10+100+1000+10000-0.25*4+1
=11110-1+1
=11110