Răspuns:
Explicație pas cu pas:
45 : 5 = 9
45 : 9 = 5
45 : 3 = 15
45 : 1 = 45
_____________
20 : 1 = 20
20 ; 2 = 10
20 : 4 = 5
20 : 5 = 4
_______________
72 : 1 = 72
72 : 2 = 36
72 : 3 = 24
72 : 4 = 18
72 : 6 = 12
72 : 8 = 9
72 : 9 = 8
______________
48 : 1 = 48
48 : 2 = 24
48 : 3 = 16
48 : 4 = 12
48 : 6 = 8
48 : 8 = 6