Ахиллес и черепаха

Этот парадокс - одна из апорий (затруднений) Зенона. Автором этого парадоксального рассуждения является Зенон Элейский, древнегреческий философ, живший около двух с половиной тысяч лет назад (!).

Ахиллес и черепаха движутся по прямой в одну и ту же сторону, черепаха находится на расстоянии 1000 метров впереди Ахиллеса. Ахиллес бежит в 10 раз быстрее, чем ползёт черепаха.

Ахиллес никогда не догонит черепаху, ведь пока он пробежит 1000 метров до того места, где находилась черепаха, та уже отползёт на 100 метров вперёд. Когда же Ахиллес пробежит и эти 100 метров, черепаха отползёт ещё немного дальше. Это будет продолжаться бесконечно: каждый раз, когда Ахиллес бежит до места, где была черепаха, она уже отползёт на некоторое расстояние.

Сможете ли вы опровергнуть это утверждение?


Средняя оценка: 3.7 (94 голосов)

1   28.08.2018 - 02:38 Cetat51 пишет:

http://techwarriorteam.ning.com/profiles/blogs/order-azithromycin-safely-where-can-i-purchase-zithromax-free
http://howidoit.ning.com/profiles/blogs/farmacia-online-donde-comprar-tadalafilum-10-mg-r-pido-bolivia
http://www.dzairmobile.com/fr/questions/3422/acheter-meclizine-hydrochloride-acheter-antivert-ordonnance
http://www.facecool.com/profiles/blogs/farmacia-online-donde-comprar-generico-sildenafil-citrate-sin-1
http://www.collabzo.com/pwrportal/blogs/69/1519/trimin-o-acheter-prix-pilule-t
http://www.facecool.com/profiles/blogs/comprar-tagra-tadalafil-20-mg-gen-rico-pre-o-na-internet-rep
http://www.facecool.com/profiles/blogs/comprar-direktan-50-mg-gen-rico-pre-o-do-sildenafil-citrate-na
http://divinguniverse.com/blogs/post/49829
http://snopeczek.hekko.pl/213032/filagra-online-purchase-sildenafil-citrate-trusted-pharmacy
http://fluidlyfe.org/blogs/316/11881/puedo-comprar-generico-clomifeno-50-mg-sin-receta-de-forma-segu
http://recampus.ning.com/m/blogpost?id=6556033%3ABlogPost%3A2464391
http://emailmycar.com/blogs/16464/5305/levothyroxine-livraison-rapide-bas-prix-prix-de-levothyroxine
http://webclub.allpix.net.ee/groupware/blogs/post/18140
http://writeskills.ning.com/profiles/blogs/simvastatina-donde-puedo-comprar-al-mejor-precio-uruguay

2   28.08.2018 - 02:43 Jayey05 пишет:

http://www.onfeetnation.com/profiles/blogs/order-segurex-cheap-where-can-i-buy-sildenafil-citrate-safely http://techwarriorteam.ning.com/profiles/blogs/site-seguro-para-comprar-grifulvin-250-mg-na-internet-brasil https://www.olliesmusic.com/blog/2931/order-rabeprazole-20mg-low-price/ http://shamrockballerz.ning.com/profiles/blogs/trihexyphenidyl-2mg-o-achat-sans-ordonnance-artane-en-pharmacie http://mcdonaldauto.ning.com/profiles/blogs/daclatasvir-pas-cher-acheter-daklinza-forum-acheter http://webhiveteam.com/demo4_chameleon/blogs/2774/43993/maxigra-comprar-sin-receta-de-fo http://www.facecool.com/profiles/blogs/farmacia-online-donde-comprar-generico-circulass-sildenafil http://prothunder.com.br/rede1/blogs/post/11308 http://adrenalineprovinggrounds.ning.com/profiles/blogs/farmacia-online-donde-comprar-itraconazol-100mg-fiable-uruguay http://network-marketing.ning.com/profiles/blogs/farmacia-online-donde-comprar-amoxicilina-clavulanico-250-125-mg https://bananabook.net/blogs/342/12171/achat-express-vidalista-40-mg-bon-prix-visa-tadalafil-france http://www.myworldcircle.com/blogs/597/3181/isosorbide-mononitrate-20-mg-ou-en-acheter-sur-internet-achet http://facebookhitlist.com/m/blogpost?id=6368021%3ABlogPost%3A4219640 http://adrenalineprovinggrounds.ning.com/profiles/blogs/onde-comprar-methocarbamol-500mg-sin-receta-de-confianza http://neikasworld.ning.com/profiles/blogs/puedo-comprar-generico-zenavil-tadalafil-sin-receta-con-seguridad http://griffithchafey.ning.com/profiles/blogs/donde-para-ordenar-imdur-con-seguridad http://opencu.com/profiles/blogs/farmacia-online-donde-comprar-stendra-100-mg-fiable-reino-de-espa http://www.holidayscanada.com/blogs/32/757/isosorbida-10-mg-comprar-en-farmacia-online-con-seguridad-boliv http://facebookhitlist.com/profiles/blogs/clorpromazina-thorazine-onde-comprar-gen-rico-sem-prescri-o http://whozwholive.ning.com/profiles/blogs/levonorgestrel-0-25-mg-comprar-sin-receta-barato-guatemala-plan-b http://recampus.ning.com/m/blogpost?id=6556033%3ABlogPost%3A2468122 http://adepthomeimprovements.net/?option=com_k2&view=itemlist&task=user&id=17186 http://ykien.info/index.php?qa=29939&qa_1=donde-a-la-orden-epivir-lamivudine-sin-receta-con-visa http://whozwholive.ning.com/profiles/blogs/lamotrigin-lamotrigine-generique-achat-livraison-gratuit http://www.ppso.ro/ask/7414/achat-de-provera-peut-on-acheter-provera-en-ligne http://hellyeahband.ning.com/profiles/blogs/como-fa-o-para-comprar-apcalis-gen-rico-n-o-precisa-receita-m

3   28.08.2018 - 02:44 Jayey05 пишет:

http://www.onfeetnation.com/profiles/blogs/order-segurex-cheap-where-can-i-buy-sildenafil-citrate-safely http://techwarriorteam.ning.com/profiles/blogs/site-seguro-para-comprar-grifulvin-250-mg-na-internet-brasil https://www.olliesmusic.com/blog/2931/order-rabeprazole-20mg-low-price/ http://shamrockballerz.ning.com/profiles/blogs/trihexyphenidyl-2mg-o-achat-sans-ordonnance-artane-en-pharmacie http://mcdonaldauto.ning.com/profiles/blogs/daclatasvir-pas-cher-acheter-daklinza-forum-acheter http://webhiveteam.com/demo4_chameleon/blogs/2774/43993/maxigra-comprar-sin-receta-de-fo http://www.facecool.com/profiles/blogs/farmacia-online-donde-comprar-generico-circulass-sildenafil http://prothunder.com.br/rede1/blogs/post/11308 http://adrenalineprovinggrounds.ning.com/profiles/blogs/farmacia-online-donde-comprar-itraconazol-100mg-fiable-uruguay http://network-marketing.ning.com/profiles/blogs/farmacia-online-donde-comprar-amoxicilina-clavulanico-250-125-mg https://bananabook.net/blogs/342/12171/achat-express-vidalista-40-mg-bon-prix-visa-tadalafil-france http://www.myworldcircle.com/blogs/597/3181/isosorbide-mononitrate-20-mg-ou-en-acheter-sur-internet-achet http://facebookhitlist.com/m/blogpost?id=6368021%3ABlogPost%3A4219640 http://adrenalineprovinggrounds.ning.com/profiles/blogs/onde-comprar-methocarbamol-500mg-sin-receta-de-confianza http://neikasworld.ning.com/profiles/blogs/puedo-comprar-generico-zenavil-tadalafil-sin-receta-con-seguridad http://griffithchafey.ning.com/profiles/blogs/donde-para-ordenar-imdur-con-seguridad http://opencu.com/profiles/blogs/farmacia-online-donde-comprar-stendra-100-mg-fiable-reino-de-espa http://www.holidayscanada.com/blogs/32/757/isosorbida-10-mg-comprar-en-farmacia-online-con-seguridad-boliv http://facebookhitlist.com/profiles/blogs/clorpromazina-thorazine-onde-comprar-gen-rico-sem-prescri-o http://whozwholive.ning.com/profiles/blogs/levonorgestrel-0-25-mg-comprar-sin-receta-barato-guatemala-plan-b http://recampus.ning.com/m/blogpost?id=6556033%3ABlogPost%3A2468122 http://adepthomeimprovements.net/?option=com_k2&view=itemlist&task=user&id=17186 http://ykien.info/index.php?qa=29939&qa_1=donde-a-la-orden-epivir-lamivudine-sin-receta-con-visa http://whozwholive.ning.com/profiles/blogs/lamotrigin-lamotrigine-generique-achat-livraison-gratuit http://www.ppso.ro/ask/7414/achat-de-provera-peut-on-acheter-provera-en-ligne http://hellyeahband.ning.com/profiles/blogs/como-fa-o-para-comprar-apcalis-gen-rico-n-o-precisa-receita-m

4   28.08.2018 - 02:51 Adujo83 пишет:

http://ceveplasakbiz.xlphp.net/index.php?qa=23690&qa_1=ordenar-sotalol-receta-online-estados-unidos-comprar-betapace http://howidoit.ning.com/profiles/blogs/comprar-fluticasona-0-125-mg-sin-receta-barato-espa-a-flovent-0 http://howidoit.ning.com/profiles/blogs/site-seguro-para-comprar-gen-rico-forzak-envio-rapido-brasil http://hellyeahband.ning.com/profiles/blogs/cialis-order-without-prescription-how-to-buy-cheap-cialis-online https://23bestcity.de/blogs/post/11135 http://www.dzairmobile.com/fr/questions/5066/fluconazole-acheter-livraison-diflucan-pharmacie-ordonnance http://mcdonaldauto.ning.com/profiles/blogs/farmacia-online-donde-comprar-atarax-sin-receta-con-seguridad http://mcspartners.ning.com/profiles/blogs/dapoxetina-comprar-con-seguridad-paraguay http://amusecandy.com/blogs/post/125398 http://bobford.ning.com/profiles/blogs/comprar-elimite-permethrin-de-forma-segura-brasil http://neikasworld.ning.com/profiles/blogs/discount-tadalafil-dapoxetine-20-60-mg-order-online-tadalafil http://cylindrymiarowe.pl/blogs/post/5933 http://jawbite.ning.com/profiles/blogs/combivent-ipratropium-bromide-albuterol-sulfate-0-1-mg-como http://movsam.ning.com/profiles/blogs/farmacia-en-linea-donde-comprar-generico-olmesartan-40mg-con http://lydlabs.ning.com/m/blogpost?id=6392863%3ABlogPost%3A494844 http://q2a.buenaespina.com/293/ondansetron-comprar-sin-receta-r%C3%A1pido http://recampus.ning.com/profiles/blogs/onde-comprar-detrusan-2-5-mg-gen-rico-sem-prescri-o http://techwarriorteam.ning.com/profiles/blogs/linezolida-600-mg-comprar-en-farmacia-en-linea-ahora-ecuador http://jaktlumaczyc.pl/46073/commander-pilule-microamox-250mg-acheter-microamox-qu%26%23233 http://neolatino.ning.com/profiles/blogs/donde-para-ordenar-alclimax-200-mg-ahora-argentina-venta-de http://adrenalineprovinggrounds.ning.com/profiles/blogs/zeagra-sildenafil-citrate-200-mg-comprar-entrega-r-pida-on-line http://www.q-voice.tv/old/redirect/test/qa/index.php?qa=25248&qa_1=lasix-order-cheap-mexican-lasix https://www.gfsociallife.com/blogs/189/911/farmacia-en-linea-donde-comprar-generico-sildenafil-fluoxetine https://www.buddystalk.com/blogs/533/5501/promethazine-en-ligne-moins-cher-securise-commander-promethaz http://howidoit.ning.com/profiles/blogs/virval-500mg-como-puedo-comprar-por-internet-comprar-valacyclovir http://snopeczek.hekko.pl/209740/indapamide-donde-comprar-sin-receta-ahora-espana http://bygda.traktor.no/profiles/blogs/comprar-atomoxetina-strattera-gen-rico-sem-prescri-o-pela http://www.facecool.com/profiles/blogs/donde-para-ordenar-finax-5mg-sin-receta-en-farmacia-online-panam http://chanakyanetstudy.com/chanakyanetstudyforum/?qa=1080&qa_1=carbamazepina-comprar-farmacia-recomendada-carbamazepina http://cqa.aaua.edu.ng/index.php?qa=14770&qa_1=fiable-achat-mirtazapine-30mg-mirtazapine-belgique-achat

5   28.08.2018 - 02:51 Adujo83 пишет:

http://ceveplasakbiz.xlphp.net/index.php?qa=23690&qa_1=ordenar-sotalol-receta-online-estados-unidos-comprar-betapace http://howidoit.ning.com/profiles/blogs/comprar-fluticasona-0-125-mg-sin-receta-barato-espa-a-flovent-0 http://howidoit.ning.com/profiles/blogs/site-seguro-para-comprar-gen-rico-forzak-envio-rapido-brasil http://hellyeahband.ning.com/profiles/blogs/cialis-order-without-prescription-how-to-buy-cheap-cialis-online https://23bestcity.de/blogs/post/11135 http://www.dzairmobile.com/fr/questions/5066/fluconazole-acheter-livraison-diflucan-pharmacie-ordonnance http://mcdonaldauto.ning.com/profiles/blogs/farmacia-online-donde-comprar-atarax-sin-receta-con-seguridad http://mcspartners.ning.com/profiles/blogs/dapoxetina-comprar-con-seguridad-paraguay http://amusecandy.com/blogs/post/125398 http://bobford.ning.com/profiles/blogs/comprar-elimite-permethrin-de-forma-segura-brasil http://neikasworld.ning.com/profiles/blogs/discount-tadalafil-dapoxetine-20-60-mg-order-online-tadalafil http://cylindrymiarowe.pl/blogs/post/5933 http://jawbite.ning.com/profiles/blogs/combivent-ipratropium-bromide-albuterol-sulfate-0-1-mg-como http://movsam.ning.com/profiles/blogs/farmacia-en-linea-donde-comprar-generico-olmesartan-40mg-con http://lydlabs.ning.com/m/blogpost?id=6392863%3ABlogPost%3A494844 http://q2a.buenaespina.com/293/ondansetron-comprar-sin-receta-r%C3%A1pido http://recampus.ning.com/profiles/blogs/onde-comprar-detrusan-2-5-mg-gen-rico-sem-prescri-o http://techwarriorteam.ning.com/profiles/blogs/linezolida-600-mg-comprar-en-farmacia-en-linea-ahora-ecuador http://jaktlumaczyc.pl/46073/commander-pilule-microamox-250mg-acheter-microamox-qu%26%23233 http://neolatino.ning.com/profiles/blogs/donde-para-ordenar-alclimax-200-mg-ahora-argentina-venta-de http://adrenalineprovinggrounds.ning.com/profiles/blogs/zeagra-sildenafil-citrate-200-mg-comprar-entrega-r-pida-on-line http://www.q-voice.tv/old/redirect/test/qa/index.php?qa=25248&qa_1=lasix-order-cheap-mexican-lasix https://www.gfsociallife.com/blogs/189/911/farmacia-en-linea-donde-comprar-generico-sildenafil-fluoxetine https://www.buddystalk.com/blogs/533/5501/promethazine-en-ligne-moins-cher-securise-commander-promethaz http://howidoit.ning.com/profiles/blogs/virval-500mg-como-puedo-comprar-por-internet-comprar-valacyclovir http://snopeczek.hekko.pl/209740/indapamide-donde-comprar-sin-receta-ahora-espana http://bygda.traktor.no/profiles/blogs/comprar-atomoxetina-strattera-gen-rico-sem-prescri-o-pela http://www.facecool.com/profiles/blogs/donde-para-ordenar-finax-5mg-sin-receta-en-farmacia-online-panam http://chanakyanetstudy.com/chanakyanetstudyforum/?qa=1080&qa_1=carbamazepina-comprar-farmacia-recomendada-carbamazepina http://cqa.aaua.edu.ng/index.php?qa=14770&qa_1=fiable-achat-mirtazapine-30mg-mirtazapine-belgique-achat

6   28.08.2018 - 03:05 Junig59 пишет:

http://lifestir.net/blogs/post/58687
http://www.onfeetnation.com/profiles/blogs/securon-80mg-donde-comprar-en-internet-estados-unidos
http://lydlabs.ning.com/profiles/blogs/comprar-generico-trandate-labetalol-200-mg-en-l-nea
http://griffithchafey.ning.com/m/blogpost?id=6604043%3ABlogPost%3A1517269
http://griffithchafey.ning.com/profiles/blogs/site-acheter-desmopressine-pharmacie-paris-desmopressine-sans
http://foodtube.net/profiles/blogs/buy-levitra-soft-20mg-how-to-order-vardenafil-in-approved
http://snopeczek.hekko.pl/221123/realizar-clorpromazina-garantia-clorpromazina-farmacias
http://writeskills.ning.com/profiles/blogs/farmacia-online-donde-comprar-falic-200mg-sin-receta-de-confianza
http://snopeczek.hekko.pl/201165/farmacia-spironolactona-comprar-spironolactona-aldactone
http://whozwholive.ning.com/profiles/blogs/farmacia-en-linea-donde-comprar-cetirizina-10mg-sin-receta-mas
http://kutoos.unifiedly.com/blogs/post/195223
http://barbershoppers.org/blogs/post/42689
http://writeskills.ning.com/profiles/blogs/aripiprazole-bas-prix-et-sans-ordonnance-aripiprazole-prix-en
http://thehiphophub.ning.com/m/blogpost?id=6473652%3ABlogPost%3A2190042
http://amusecandy.com/blogs/post/103982
http://poemreader.ning.com/profiles/blogs/salmeterol-0-025-mg-donde-comprar-online-estado-libre-asociado-de
http://mynspot.com/blogs/35005/1976/low-price-sildenon-120mg-order-online-can-i-purchase-sildenaf

7   28.08.2018 - 03:05 Junig59 пишет:

http://lifestir.net/blogs/post/58687
http://www.onfeetnation.com/profiles/blogs/securon-80mg-donde-comprar-en-internet-estados-unidos
http://lydlabs.ning.com/profiles/blogs/comprar-generico-trandate-labetalol-200-mg-en-l-nea
http://griffithchafey.ning.com/m/blogpost?id=6604043%3ABlogPost%3A1517269
http://griffithchafey.ning.com/profiles/blogs/site-acheter-desmopressine-pharmacie-paris-desmopressine-sans
http://foodtube.net/profiles/blogs/buy-levitra-soft-20mg-how-to-order-vardenafil-in-approved
http://snopeczek.hekko.pl/221123/realizar-clorpromazina-garantia-clorpromazina-farmacias
http://writeskills.ning.com/profiles/blogs/farmacia-online-donde-comprar-falic-200mg-sin-receta-de-confianza
http://snopeczek.hekko.pl/201165/farmacia-spironolactona-comprar-spironolactona-aldactone
http://whozwholive.ning.com/profiles/blogs/farmacia-en-linea-donde-comprar-cetirizina-10mg-sin-receta-mas
http://kutoos.unifiedly.com/blogs/post/195223
http://barbershoppers.org/blogs/post/42689
http://writeskills.ning.com/profiles/blogs/aripiprazole-bas-prix-et-sans-ordonnance-aripiprazole-prix-en
http://thehiphophub.ning.com/m/blogpost?id=6473652%3ABlogPost%3A2190042
http://amusecandy.com/blogs/post/103982
http://poemreader.ning.com/profiles/blogs/salmeterol-0-025-mg-donde-comprar-online-estado-libre-asociado-de
http://mynspot.com/blogs/35005/1976/low-price-sildenon-120mg-order-online-can-i-purchase-sildenaf

8   28.08.2018 - 03:23 Ilogo51 пишет:

http://www.holidayscanada.com/blogs/269/7465/furacin-nitrofurazone-25-mg-como-puedo-comprar-con-garantia-par
http://snopeczek.hekko.pl/219110/farmacia-comprar-generico-ivermectin-receta-envio-gratis
http://ask2learn.com/?qa=3103/comprar-gen%C3%A9rico-naprosyn-naproxen-naproxen-gen%C3%A9rico-original
http://webhiveteam.com/demo4_chameleon/blogs/2775/43801/onde-comprar-o-gen-rico-do-silde
http://movsam.ning.com/profiles/blogs/achat-discrete-lumigan-bimatoprost-3-mg-bimatoprost-ou-l-acheter
http://divinguniverse.com/blogs/post/16506
http://www.dzairmobile.com/fr/questions/15564/achat-en-ligne-prostanovag-le-prix-du-finasteride-en-france
http://www.myworldcircle.com/blogs/1060/12475/farmacia-online-donde-comprar-generico-pioglitazonum-ahora-chil
http://amusecandy.com/blogs/post/77397
http://ecobeautylounge.ning.com/profiles/blogs/donde-para-ordenar-exerdya-tadalafil-sin-receta-online-reino-de
http://whazzup-u.com/profiles/blogs/glipizida-puedo-comprar-sin-receta-por-internet-argentina-comprar
http://www.holidayscanada.com/blogs/331/9627/order-tastylia-20mg-how-to-buy-tadalafil-no-need-rx
http://answers.codelair.com/975/trecator-comprar-colombia-comprar-ethionamide-farmacias

9   28.08.2018 - 04:14 Ohuwu01 пишет:

http://www.taffebook.com/blogs/1637/6315/farmacia-online-donde-comprar-microzide-sin-receta-rapido-urugu http://jaktlumaczyc.pl/46586/realizar-lifibrat-receta-internet-lifibrat-online-seguro http://adrenalineprovinggrounds.ning.com/profiles/blogs/order-nitrofurazone-20mg-online-how-to-purchase-furacin-no-need http://bobford.ning.com/profiles/blogs/site-achat-salmeterol-commande-de-salmeterol-par-internet http://lydlabs.ning.com/profiles/blogs/bon-site-achat-desmopressine-ddavp-0-01-mg-online http://hellyeahband.ning.com/profiles/blogs/buy-sildenafil-la-sante-50mg-no-rx-can-i-purchase-viagra-no-rx http://higgs-tours.ning.com/profiles/blogs/quetiapina-200-mg-puedo-comprar-en-l-nea-colombia-comprar http://latinosdelmundo.com/blogs/839/2406/zenegra-50mg-baisse-prix-sur-internet-zenegra-prix-en-france http://network-marketing.ning.com/profiles/blogs/dostinex-cabergoline-0-25-mg-como-comprar-sin-receta-urgente http://lifestir.net/blogs/post/45959 http://mcspartners.ning.com/profiles/blogs/se-puede-comprar-ezetimibe-sin-receta-en-internet-andorra-venta http://igotcomplaintsnetwork1.com/blogs/328/11364/farmacia-online-donde-comprar-generico-metronidazol-sin-receta http://techakhil.byethost4.com/ques2ans/index.php?qa=27854&qa_1=ledipasvir-sofosbuvir-90-400-mg-onde-comprar-online-brasil http://bygda.traktor.no/profiles/blogs/donepezila-comprar-en-una-farmacia-online-con-un-descuento-reino http://fluidlyfe.org/blogs/320/13667/generique-floxin-100mg-commander-ofloxacin-generique-300-prix

10   28.08.2018 - 04:14 Ohuwu01 пишет:

http://www.taffebook.com/blogs/1637/6315/farmacia-online-donde-comprar-microzide-sin-receta-rapido-urugu http://jaktlumaczyc.pl/46586/realizar-lifibrat-receta-internet-lifibrat-online-seguro http://adrenalineprovinggrounds.ning.com/profiles/blogs/order-nitrofurazone-20mg-online-how-to-purchase-furacin-no-need http://bobford.ning.com/profiles/blogs/site-achat-salmeterol-commande-de-salmeterol-par-internet http://lydlabs.ning.com/profiles/blogs/bon-site-achat-desmopressine-ddavp-0-01-mg-online http://hellyeahband.ning.com/profiles/blogs/buy-sildenafil-la-sante-50mg-no-rx-can-i-purchase-viagra-no-rx http://higgs-tours.ning.com/profiles/blogs/quetiapina-200-mg-puedo-comprar-en-l-nea-colombia-comprar http://latinosdelmundo.com/blogs/839/2406/zenegra-50mg-baisse-prix-sur-internet-zenegra-prix-en-france http://network-marketing.ning.com/profiles/blogs/dostinex-cabergoline-0-25-mg-como-comprar-sin-receta-urgente http://lifestir.net/blogs/post/45959 http://mcspartners.ning.com/profiles/blogs/se-puede-comprar-ezetimibe-sin-receta-en-internet-andorra-venta http://igotcomplaintsnetwork1.com/blogs/328/11364/farmacia-online-donde-comprar-generico-metronidazol-sin-receta http://techakhil.byethost4.com/ques2ans/index.php?qa=27854&qa_1=ledipasvir-sofosbuvir-90-400-mg-onde-comprar-online-brasil http://bygda.traktor.no/profiles/blogs/donepezila-comprar-en-una-farmacia-online-con-un-descuento-reino http://fluidlyfe.org/blogs/320/13667/generique-floxin-100mg-commander-ofloxacin-generique-300-prix

Познавательно

Человеческая рука есть одна из первых счетных машин!

Движением пальца. Положите обе руки рядом на стол и протяните пальцы. Каждый палец слева направо будет означать соответствующее порядковое число: первый слева — 1, второй — 2, третий — 3, четвертый — 4 и т. д. до десятого, который будет обозначать число 10. Например, Нам необходимо умножить 7 на 9. Теперь поднимите седьмой палец. Число пальцев, лежащих налево от поднятого пальца, будет числом десятков произведения, а число пальцев направо — числом единиц. Налево от поднятого пальца лежат 6 пальцев, а направо — 3. Значит, результат умножения 7 на 9 равен 63.

Это удивительное на первый взгляд механическое умножение тотчас же станет понятным, если вспомнить, что сумма цифр в каждом произведении чисел таблицы умножения на девять равна девяти, а число десятков в произведении всегда на 1 меньше того числа, которое мы умножаем на 9. Поднятием соответствующего пальца это мы и отмечаем, а следовательно, и умножаем.