名詞 calculation:

1. the procedure of calculating; determining something by mathematical or logical methods
   同義詞：computation, computing
2. problem solving that involves numbers or quantities
   同義詞：computation, figuring, reckoning
3. planning something carefully and intentionally
   同義詞：deliberation

1. Where (ie At what point) did I go wrong in my calculation?
   我在計(jì)算中什麼地方出了差錯(cuò)?
2. My calculation is based on notional figures, since the actual figures are not yet available.
   因尚無實(shí)際數(shù)字，我是根據(jù)估計(jì)的數(shù)字計(jì)算的。
3. Your calculation is way off beam.
   你的計(jì)算大錯(cuò)特錯(cuò)。
4. The calculation was difficult, but we finally cracked it.
   計(jì)算起來很費(fèi)勁，然而我們終於解決了。
5. You are out in your calculation.
   你失算了。
6. After much calculation, they offered him the job.
   經(jīng)過慎重考慮，他們把這項(xiàng)工作交給他了。

cal.cu.la.tion

n.（名詞）
Abbr. calc.
縮寫 calc.
The act, process, or result of calculating.
計(jì)算：計(jì)算的行為、操作或結(jié)果
An estimate based on probabilities.
估計(jì)：基于概率的一種估計(jì)
Careful, often cunning estimation and planning of likely outcomes, especially to advance one`s own interests.
深思熟慮：認(rèn)真的、常是機(jī)敏的對(duì)可能結(jié)果的估計(jì)和計(jì)劃，特指為提高個(gè)人的利益

【引伸】
cal.cula.tive
adj.（形容詞）