Sharon, so the hive should weight about 150 pounds, I am kind of laughing a little bit here at the thought of you picking up the colonies to see if they that much, hee, hee. Seriously. It is hard to tell how much they weight unless you have some kind of scale for lifting the hives.
I have finished feeding now. I am not going to feed anymore. I will put dry sugar on the top of the inner cover just in case they need some emergency food. That can be checked quickly to see if they are using any of it. If they do use any, I will know that I have not fed enough. I have kept a record of how much I have fed them and when I started feeding. This will be for next year to know pretty close to if I have fed them enough sugar syrup.
This weighing of the hive is a hard thing for one who does not possess a scale. So, what I would suggest is: try and lift the back of the hive up and see if it feels heavy to you. If it feels really heavy, then they probably have a fair amount of stores. You could do this regularly, and note how it feels each time in your mind. If you find that the hives are feeling quite light, then you want to resume some kind of feeding.
Sharon, all areas where people keep bees are so different, it is hard to say exactly how much you would need for your bees. I know in our area, it is advised to have about 60 pounds of honey in the colonies. You might get some more excellent responses from our friends here. Have a wonderful and great day. Cindi