Răspuns :
A 9x4-7x2=12 36-14=22 fals
B 9x6-7x6=12 54-42=12 adevarat
C 9x9-7x3=12 81-21=60 fals
D 9x9-7x5=12 81-35=46 fals
B 9x6-7x6=12 54-42=12 adevarat
C 9x9-7x3=12 81-21=60 fals
D 9x9-7x5=12 81-35=46 fals