Află numerele necunoscute:

Răspuns:
65000:a=1000=> a=65000:1000=> a=65
320×b=320000=>b=320000÷320=>b=100
(70×d):700=700
70×d=700×700
70×d=490000
d=490000÷7=>d=70.000
(56000÷560)×e=6300
100×e=6300=> e=63
f×(67000÷67)=39000
f×1000=39000
f=39000/1000
f=39