Da dama hanyoyin da za a lissafa yawan adadi (da kuma ayyuka na irin wannan nau'i)

Lissafi na da yawan na lamba - daya daga cikin muhimman hakkokin gaskiyar cewa duk dauki wuri a cikin makaranta a kan ilmin lissafi darussa. Amma wannan ba yana nufin kowa ya san shi da sauƙi ba. A gaskiya ma, batun yana da sauki, abu mafi mahimmanci shine sanin hanyoyin da aka tabbatar da ƙididdige duka ta hanyar sassa da kashi ɗaya na duka.

1% shine kashi ɗaya bisa dari na dukan, don haka sanin wannan darajar, zaka iya lissafin darajar wannan sashi. Alal misali, kashi 15 cikin dari na lamba 60 za a iya lissafta kamar haka: dauki kashi 60 cikin kashi 100. Sa'an nan 1% shine 60/100 - 0.6. 15%, saboda haka, za su kasance - 0,6 * 15 = 9. Wannan ita ce hanyar farko don lissafta yawan adadi.

Hanya na biyu ita ce tabbatar da daidaito. 15 tana nufin 100, kamar yadda X yana nufin 60, wato 15/100 = x / 60. Zaka iya warware abun da ke ciki a hanyoyi biyu:

1. Sanya shi zuwa magana x = 15 * 60/100. Kuma kuma ya juya: x = 9.
2. Don yin wani canji, cikin ayyuka 2: 100x = 15 * 60, wato, lambobi a cikin ƙimar suna ninka ƙetare. Daga wannan magana mun sami wadannan: 100x = 900. Saboda haka, x = 9.

Idan kana buƙatar gano yawan adadin lamba wani lamba ne, wannan mahimmanci kuma mai sauqi ne. Alal misali, lambobi 70 da 13. Bari 70 zama 100%, kuma 13 - x. Sa'an nan 13/70 = x / 100. Gyara wannan haɗin zai iya zama sababbin hanyoyi.

70x = 13 * 100; 70x = 1300; Idan kayi zagaye na biyu na kashi na biyu, sai dai x = 18.57%.

Idan ka san yawan adadin lamba kuma kana buƙatar samun wannan lambar, to wannan aikin za a iya warwarewa gaba daya.

Alal misali, 16% ne 32. Mene ne lamba? Bugu da ƙari, haɓaka kashi: 16% na nufin 100%, da 32 zuwa x. 16/100 = 32 / x; 16x = 3200; X = 3200/16 = 200.

Idan yanayin matsalar ta kasance kamar cewa lambar A ita ce wani adadin lamba B, wanda dole ne a ƙididdige shi, sa'annan wata hanya mai sauƙi ta shafi. A / B * 100% - wannan ita ce amsar. Alal misali, kana buƙatar gano yawan kashi dari na lamba 87 daga lambar 329.

Ana kirga sakamakon ta hanyar dabara, mun sami 87/329 * 100% = 26.44%. Idan aka manta da wannan tsari a daidai lokacin, zamu iya samun taimako: 87 yana nufin 329, kamar yadda x yana nufin 100%, 87/329 = x / 100. Bayan mun canza wannan ƙimar, mun sami 329x = 87 * 100; 329x = 8700; X = 8700/329 = 26.44%.

Hakanan, sauƙi mafi sauki shine kusan kullum a cikin kunnen mutum da kuma kai: kashi ɗaya shine kashi 20%, kashi ɗaya cikin goma shine 10%, rabi da kashi huɗu cikin kashi 50% da 25%, bi da bi. Ga wani, ya fi dacewa kuma ya fi dacewa don tunani a sassa, kuma yana da sauƙi ga wani ya yi aiki tare da sha'awa. Babu bambanci sosai tsakanin daya na biyu da 50%.

Tare da kalkaleta kuma zai zama sauƙi da sauƙi, saboda akwai maɓallin na musamman wanda ya ba ka damar lissafin sha'awa.

Hakika, duk wadannan ayyuka shine kawai karfafa ka'idar. Amma lissafin adadin lambar zai iya buƙata a rayuwa. A kan tallace-tallace, don gano idan farashin kaso 30% yana da daraja ga wani abu, ko kuwa yana da adadi mai yawa. Kuna iya tantance abin da farashin ya kasance a gaban rangwame, da kuma haɗin giciye masu sayarwa - bayan duk, sukan yi amfani da wadanda ba su kula da su ba kuma suna nuna alamun farashin su ne ƙididdiga masu kyau.

Kira yawan adadin lambar za a iya buƙatar kuma a yayin da aka kirga haraji, ba shakka, ga wadanda ke yin waƙa irin waɗannan abubuwa. Kuma, ba shakka, da amfani lissafi an kullum fuskanci bincike, tattalin arziki, stockbrokers da kuma manazarta. A gaskiya ma, ko da ma'auratan suna ci gaba da ba da sha'awa, ba tare da saninsa ba.

A cikin kalma, batun bai da wuya, ko da yake yana kallon kallon farko yana da wuyar gaske. Duk da haka, a lokacin da ta je fahimtar, ɗawainiya game da lissafi na ban sha'awa a kan yawan da kuma a kan dukan sashi, ze tsaba. Kuna buƙatar cika hannunka kuma motsa zuciyar ku kadan.