90:30=! 100:20=! 7•8-42:7=! 9•9-9•3=! 36:4+27=! 50-21:3=!

Question

90:30=! 100:20=! 7•8-42:7=! 9•9-9•3=! 36:4+27=! 50-21:3=!

Comments

с факториалами?

Answer 1

90:30=3  100:20=5  7×8-42:7=50  9×9-9×3=54  36:4+27=36  50-21:3=43

Answer 2

1)3;2) 5 ;3)50 ;4)54;5)36;6)43