Answer:
you can multiply nothing by 5 to get you any of those numbers
Answer: 
Step-by-step explanation:

I think -6 switches to -3
Answer:
2
Step-by-step explanation:
3÷3×7÷9-2÷3×9÷9
Step-by-step explanation:
3×7=21
3×9=27
21÷27=7÷9
2×9=18
3×9=27
18÷27=2÷3
7÷9-2÷3=5÷6