Ilu uczniów liczy klasa jeżeli :
a)3/4 całości to 18 uczniów
b)3/5 całości to 12 uczniów .
Oblicz
a) 3/5 dłogości gróg jeżeli całą droga to 60 km .
b) 3/4 trasy liczącej 80 km .
Błagam o rozwiąznia !!!!!! <3 . Daję naj.. ;d
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1
a) proporcja
3/4 = 18
1 = x z tego x = 18 : 3/4 = 24
b) 3/5 =12
1 = x z tego x = 12 : 3/5 = 20
2
a) 60 * 3/5 = 36
b) 80 * 3/4 = 60
a)![18/\frac{3}{4}=\frac{18}{1}*\frac{4}{3}=\frac{72}{3}=24 18/\frac{3}{4}=\frac{18}{1}*\frac{4}{3}=\frac{72}{3}=24](https://tex.z-dn.net/?f=18%2F%5Cfrac%7B3%7D%7B4%7D%3D%5Cfrac%7B18%7D%7B1%7D%2A%5Cfrac%7B4%7D%7B3%7D%3D%5Cfrac%7B72%7D%7B3%7D%3D24)
b)![12/\frac{3}{5}=\frac{12}{1}*\frac{5}{3}=\frac{60}{3}=20 12/\frac{3}{5}=\frac{12}{1}*\frac{5}{3}=\frac{60}{3}=20](https://tex.z-dn.net/?f=12%2F%5Cfrac%7B3%7D%7B5%7D%3D%5Cfrac%7B12%7D%7B1%7D%2A%5Cfrac%7B5%7D%7B3%7D%3D%5Cfrac%7B60%7D%7B3%7D%3D20)
a)![60*\frac{3}{5}=\frac{60}{1}*\frac{3}{5}=\frac{180}{5}=36 60*\frac{3}{5}=\frac{60}{1}*\frac{3}{5}=\frac{180}{5}=36](https://tex.z-dn.net/?f=60%2A%5Cfrac%7B3%7D%7B5%7D%3D%5Cfrac%7B60%7D%7B1%7D%2A%5Cfrac%7B3%7D%7B5%7D%3D%5Cfrac%7B180%7D%7B5%7D%3D36)
b)![80*\frac{3}{4}=\frac{80}{1}*\frac{3}{4}=\frac{240}{4}=60 80*\frac{3}{4}=\frac{80}{1}*\frac{3}{4}=\frac{240}{4}=60](https://tex.z-dn.net/?f=80%2A%5Cfrac%7B3%7D%7B4%7D%3D%5Cfrac%7B80%7D%7B1%7D%2A%5Cfrac%7B3%7D%7B4%7D%3D%5Cfrac%7B240%7D%7B4%7D%3D60)