a) 1 zł ile to promili 2000 zł ?
b) 5 ml ile to promili objętości 4 l ?
Plis ptrzebne na teraz !!
pliss zróbcie mi to !! ; **
< 33 ! :)
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2000zł 1000%₀
1zł x
2000x=1000%₀|2000
x=0,5
4l 4000ml
4000ml 1000%₀
5ml-x
x=1,25%₀