Răspuns :
10 patratele- 5 minute
? Patratele- 10 minute
_________________
10:5=2
10×2=20
? Patratele- 10 minute
_________________
10:5=2
10×2=20
Folosim regula de trei simpla
5 minute.............10 patratele
10 minute...............x
x=(10*10)/5
x=100/5
x=20 patratele
5 minute.............10 patratele
10 minute...............x
x=(10*10)/5
x=100/5
x=20 patratele