Question

Exercițiile 1 si 2 de la teste de evaluare

Ajutor .
Dau coroana

Answer 1

1. md=7g
ms= 350g
  c=mdx100/ms=> 7x100/350=.........................calculeaza !!!

2. ms1=200g
c1=30%---> md1= c1xms1/100= > 30x200/100= 60g

in solutia in care se adauga apa, md ramane acelasi
md2=md1=60g
dar ms creste;  ms2=ms1+m,apa= 200g+100g=300g
c2= md2x100/ms2=> 60x100/300=.........................calculeaza !!!!!

vei obtine o c% mai mica !!!