Răspuns:
2.
a)
ms=20g
md4g
C=md×100/ms=4×100/20=20%
b)
ms=600g
md=15g
C=?
C=15××100/600=calculeaza
c)
ms=400g
md=8g
C=?
C=8×100/400=calculeaza
d)
ms=2kg=2000g
md=40g
C=?
C=40×100/2000=calculeaza
3.
a) ms=250g
C=35%
md=?
md=C×ms/100=35×250/100=calculeaza
b) ms=50g
C=2,5%
md=?
md=50×2,5/100=calculeaza
c)ms=2k=2000g
C=10%
md=?
md=2000×10/100=calculeaza
d)
ms=0,8kg=800g
C=20%
md=?
md=20×800/100=calculeaza
Explicație:
