Yakuniy nazorat ishi

1- usuli 2- usuli

1) 100 : 27 ≈ 3,7 27 – 100%

 8 – x%

27x = 800

javob: 29,6% x = 800 : 27

x = 29,6%

javob: 29,6%
Masala: 4% i 120 bo’lgan sonni toping?

1- usul 1) 120:4=30,

Javob: 3 000

2- usul 4% -120

100%- x
4x=12 000,

x= 12 000 : 4,

x=3 000. Javob: 3 000

Masala: Fermer davlatga 60 tonna paxta berishi kerak. U bir haftada 18 tonna paxta topshirdi. Fermer planini necha foiz bajargan?

1 T = 1 000 kg 60 T = 60 000 kg

18 T = 18 000 kg

1- usul

1) 60 000:100= 6 00

2) 18 000:600=30 Javob: 30%.


2-usul 60 T – 100% 60x=1 800

18 T – x % x=1 800:60, x=30 Javob: 30%.

Foiz protsent formulalari

1. a sonning p foizi:

b=a*p/100

Misol. 300 sonining 15% ini toping.

Yechish:

b=300*15/100=45

Javob:45
2. p foizi b ga teng bo'lgan sonni topish:

a=b*100/p

Misol. 30% i 60 ga teng bo'lgan sonni toping.

Yechish:

a=60*100/30=200

Javob:200

3. b son a sonning necha foizini tashkil qilishini topish:

p=b*100%/a
Misol. 45 soni 50 ning necha foiziga teng.

Yechish:

p=45*100%/50=90%

Javob:90%.

Protsent. Har qanday sonning (miqdorning) yuzdan bir bo'lagi (ulushi) shu sonning birprotsenti deb ataladi. Protsent so'zi lotincha "procentum" so'zidan olingan bo'lib, yuzdan degan ma’noni 26 bildiradi. Protsent so‘zi o'rniga % belgisi ishlatiladi. Har qanday miqdorning (sonning) 1% iga uning ^ bo‘lagi (ulushi) va biror

2. Geometriya (yunon. γη - Yer, μετρεω - o'lchayman) — matematikaning bir sohasi, fazodagi geometrik jism xossalari va ular orasidagi bog'lanishlarni o'rganadi.