they are pretty similar as IF.....THEN
if=如果
then=的话
如果不下雨的话,我们就去商店。
If you got cash then we can go to the mall, because i lost my credit card.
of course not just this one usage, but hope this example can help you to understand this pair.
7 december 2014
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如果... = ...的话 = 如果......的话
yes, they are the same.
的话 highlights the second part of the sentence. that's all.
anyway, they are the same.