Wasu dabaru na yau da kullun suna da amfani sosai kuma mai sauƙi wanda zai iya zama da amfani ga ƙarni ɗaya. Amma a kan lokaci, an ko ta yaya aka manta da su kuma suka juya cikin abin da suke kira "kaka ta fada."
Adme.ru. Na yanke shawarar tuna da abin da ya gabata kuma na tattara muku dabaru 8 daga yara, game da wasu dalilai kowa ya manta.
Tantance lokacin kafin faɗuwar rana
Ninka yatsunku tare kuma ja hannunka saboda rana "lay" a kan manuniya. Yanzu yi la'akari da adadin yatsun zuwa layin sararin samaniya. Kowane yatsunsu zai zama daidai da kimanin mintuna 15 kafin faɗuwar rana.
Koyi yawan kwanakin a cikin watan
Matsi hannunka a cikin dunkulen hannu kuma fara kirgawa watanni a kan yatsun yatsunsu. Kowa Kostya da Vpadina - wannan wata ne daban . Idan kun yi tunani a hannu ɗaya, to, kai ƙarshen, sake dawowa daga ƙirar yatsa.
Idan wata daya ya fadi a kickle, to, yana da kwanaki 31, kuma idan akwai 30 ko lessasa a cikin bacin rai.
Gano wata ko ragewa
Don bayyana wa yaron, wata ya girma ko ya ragu, tambayarsa ya "sa yatsa zuwa gajarta a sararin sama. Idan harafin "P" ya juya, wata ya girma, idan "s" - yana raguwa.
Warning don haduwa
Don haddace lambobin Roman da lambobi, zaka iya amfani da irin wannan jumla: M. s D. Arim. Daga Uba L. Aljannoni H. Watit V. sem I. x. Haruffa na farko a cikin kalmomin da ake nufin Rome lemun kunne: m (1000), d (500), x (5), i (1).
Kuma, alal misali, ku tuna menene watanni kwanaki 30, zaku iya tare da taimakon kalma «apiunsen (Haruffan farko a cikin sunayen watanni).
Duba ingancin baturin
Bambanta wani baturi daga mummunan abu mai sauki. Saura batir guda biyu don 1-2 cm sama da tebur da saki. Da baturin da ke fitar da shi kuma ya fadi, sallama.
Wata hanyar ita ce don lasa da batirin "+". Idan an cajin baturin, zaku ji dandano mai ɗanɗano mara dadi, amma a gaba ɗaya yana yin batura a cikin rashin aiki.
Ci gaba a kan yatsunsu
Yawancin lokaci, da sauri suna tuna da ninka ƙananan lambobi, amma tare da lambobi 6, 7, 8 da 9 matsaloli suna tasowa. Don taimakawa a cikin wannan yaron, koya wa abin zamba mai sauƙi.
Juya hannuwanku da dabino zuwa kanka da kuma rage kowane yatsa, daga 6 zuwa 10, a kan yatsa lambar 7 zuwa 8, a hannun hagu No. 8 a hannun dama. Yawan yatsunsu a ƙasa, ƙidaya tare da haɗa, yana nufin DIZENS (Mun yi nasara 5). Kuma fi, wanda yake a saman, kuna buƙatar ninka juna - sun nuna raka'a (a cikin mu, muna ninka 3 zuwa 2). Amsa: 7 × 8 = 56.
Ta wannan hanyar, zaku iya ninka da sauri ta 6, 7 da 8.
Don ninka akan 9, daidaita yatsunku, ku sa hannuwanku ƙasa. Yanzu, don ninka kowane lamba a kan 9, kawai lanƙwasa yatsa yayin wannan lambar. Yatsunsu "kafin" nuna dubuna, "bayan" - raka'a . Misali, don ninka 7 by 9, lanƙwasa yatsa na 7. Ya rage yatsunsu 6 "zuwa" da 3 "bayan". Muna samun amsar: 7 × 9 = 63.
Tsawo
Idan kana buƙatar kusan auna batun, amma babu mai mulki a hannu, to, don wannan zaka iya yi da yatsunsu na hannu daya. A daidai da rabbarar mutum, nisa tsakanin yatsun manyan da kuma yatsun yatsunsu shine kusan 18 cm, nisa tsakanin yatsa da yatsa kadan.
Tabbas, irin wannan hanyar ba daidai ba ce, saboda kowannenmu yana da girman daban-daban na hannunka. Amma zai iya zama da amfani idan yana buƙatar auna babban abu, kuma muna da ƙaramin mulki: kawai auna nesa tsakanin yatsunsu a gaba.
Gano yawan digiri a kusurwa
Matsaka yatsun yatsunsu kuma a haɗe zuwa saman abin da kake son auna kusurwa. Yasan ɗan yatsa ya kamata ya kwanta a kan jirgin sama: yana nuna 0 °. Farin kusa da babban yatsa da kananan yatsa zai zama 90 °, kusurwa tsakanin yatsa da kuma wasu yatsunsu sune, 305, 45 °.
Tushe