What is the meaning of "Mateh Lechem"?
Why will ten women bake their bread in one oven?
Rashi: Due to lack of firewood.
Rashbam: Because one woman will not be able to fill her oven with the meager amount of bread that she is baking. 1
Perhaps they bake together due to lack of firewood (like Rashi), or in order to save wood (even if they do not lack), or because bread bakes better when the oven is full (Beitzah 17a). (PF)
What are the implications of "v'Heishivu Lachm'chem ba'Mishkal"?
Rashi: This is because the wheat will be rotten, and the baked bread will break-up into pieces in the oven, and the women will have to weigh the pieces to divide equally among themselves.
Rashbam: They weighed it before it was baked and after it was baked and returned to the owner. 1
Panim Yafos: When bread is baked properly, it is lighter than the dough was. 2 The curse is that the bread will weigh the same as the dough (it was not baked properly).
Why will you eat and not be satiated?
Rashi: This constitutes a curse in the stomach. 1
Rashbam: Due to the small weighed quantities that they ate. 2
Why did the Torah write "Sheva al Chatoseichem" and then list eight punishments?
Rashi: "Venitatem b'Yad Oyev" (in Pasuk 25) is not counted, since it is synonymous with "Cherev" in the same Pasuk.
What us the significance of 10 women?
Moshav Zekenim: It was normal to bake an Omer (the volume of 432 eggs) at a time of satiation. Now, 10 women will bake an Omer in all. 1
He does not give the source that they bake this amount. Perhaps "Lachmechem" is repeated to allude to the amount you used to eat daily (an Omer of Manna - PF).