1)
What is the significance of eating bread by weight?
1.
Rashi: This is a Siman for people under siege, who fear hunger. They eat bread by weight and drink a small measured ration of water.
2)
What do we learn from "Esrim Shekel la'Yom"?
1.
Malbim: For 390 days, they ate this amount daily 1 (refer to 4:9:4:3). After this, it will be less, for they do have so much.
1
I.e. about 170 grams. (PF)
3)
What do we learn from "me'Es v'Ad Es Tochalenu"?
1.
Radak: People will not eat twice a day, rather, only once every 24 hours.