Răspuns :
0 , 6:4=0, 15 0:4=0
0 0*4=0
-----
= 6 6:4=1
4 4*1=4
------- 6-4=2
20 20:4=5
20 5*4=20
--------
= =
0 0*4=0
-----
= 6 6:4=1
4 4*1=4
------- 6-4=2
20 20:4=5
20 5*4=20
--------
= =