imi trebuie urgent raspunsulllll

Răspuns:
a) 7×3=21 => 21:3=7 => 21-3=18
b) 9×5=45 => 45:5=9 => 45-5=40
c) 27:3=9 => 27:9=3 => 27-9=18
d) 14×2=7 => 14:7=2 => 14-7=7