Question

Ajutor ex 18,19,20,21,22,23(câte puteți face minim 3) dau coroană

Answer 1

20. pt o portie: 1/2=0.5 kg zahar
3/2=1.5 pahare apa
pt 3 portii: 1/2×3=3/2=1.5 kg zahar
3/2×3=9/2=4.5 pahare apa
21. a) mai are de citit un sfert
b) 3/4×124=372/4=93 pagini
23. a) 3/4×40=120/4=30
b) 7/5×420=2940/5=588 km
c)25/100×600=15000/100=150
d)35/100×20/100×40=28000/10000=2.8