1) (10*0,86) *100= 86*100=8600
2)(18,2:100)*1000=1820*1000=1820000
3)(5,108*1000)+(14:100)=5108+0,14=5108,14
4)(6840:10)-(2,1:100)=684-0,021=683,979
5)(80155:85)*12=943*12=11316
6)(135,135:27):5=5,005:5=1,001
7)(13,75*40):100=550:100=5,5
8)(100-0,384)*100:10=99,616*100:10=9961,6:10=996,16