Răspuns :
250-180=70
1400:70=20 g.(intr-o cutie)
250*20=5000g.
180*20=3600g.
5000-3600=1400g
r=>20g intr-o cutie
1400:70=20 g.(intr-o cutie)
250*20=5000g.
180*20=3600g.
5000-3600=1400g
r=>20g intr-o cutie