kaigi no mae ni, yosan wo dentaku de mou itido keisansimasita.

会議の前に means before the meeting.

Breakdown:

• 会議 = meeting
• の = links meeting to before
• 前 = before / in front of
• に = marks the time point before which something happens

So 会議の前に literally works like at the time before the meeting.

の connects nouns.

Here, 会議 and 前 are both nouns, so の links them:

• 会議の前 = the meeting's before = before the meeting

This is a very common pattern:

• 昼ご飯の後 = after lunch
• 授業の前 = before class
• 家の前 = in front of the house

So の is not specifically a before marker; it is the normal way to connect one noun to another.

In this sentence, に marks a time expression.

会議の前に tells you when the action happened:

• 会議の前に = before the meeting

With time-related words like 前, 後, and certain points in time, に is often used to mark the time of the action.

Compare:

• 授業の前に勉強する = study before class
• 昼ご飯の後に寝た = slept after lunch

In casual speech, に is sometimes dropped in some expressions, but in a sentence like this, keeping it is very natural and clear.

を marks the direct object of the verb.

The verb here is 計算しました = calculated.

So the thing being calculated is:

• 予算を計算しました = calculated the budget

Even though in English we might sometimes say worked out the budget or calculated the budget amount, in Japanese 予算を計算する is perfectly natural.

電卓で means with a calculator or using a calculator.

• 電卓 = calculator
• で = marks the tool, means, or method used to do something

So:

• 電卓で計算しました = calculated it with a calculator

This use of で is very common:

• 箸で食べる = eat with chopsticks
• ペンで書く = write with a pen
• バスで行く = go by bus

Here, で does not mark the place. It marks the instrument used.

もう一度 means once more, again, or one more time.

Breakdown:

• もう = already / more / again, depending on context
• 一度 = one time / once

Together:

• もう一度 = one more time

In this sentence, it means the speaker recalculated the budget again, probably to check it.

Examples:

• もう一度言ってください。 = Please say it one more time.
• もう一度考えます。 = I’ll think about it again.

Japanese normally places the main verb at the end of the sentence.

So the structure is roughly:

• [time] [object] [method] [adverb] [verb]

In this sentence:

• 会議の前に = before the meeting
• 予算を = the budget
• 電卓で = with a calculator
• もう一度 = once more
• 計算しました = calculated

This is a very standard Japanese sentence pattern.

計算しました is the polite past form.

• 計算した = plain past
• 計算しました = polite past

The sentence is probably written in polite style, which is very common in textbooks and normal conversation when speaking respectfully or neutrally.

So both mean calculated, but the tone is different:

• 計算した = casual
• 計算しました = polite

Japanese often leaves the subject unstated when it is obvious from context.

So this sentence does not explicitly say:

• I calculated
• we calculated
• he/she calculated

It simply says that the budget was recalculated before the meeting with a calculator.

In many real Japanese sentences, the subject is omitted if the listener can infer it from context. In a textbook, the natural translation is often I recalculated the budget with a calculator before the meeting.

Yes, to some extent.

Japanese word order is more flexible than English, as long as the particles stay attached to the right words.

For example, these are all possible:

• 会議の前に、予算を電卓でもう一度計算しました。
• 予算を会議の前に電卓でもう一度計算しました。
• 電卓で予算を会議の前にもう一度計算しました。

However, some orders sound more natural than others depending on what you want to emphasize. The original sentence is very natural and easy to understand.

The most important thing is:

• 予算を must stay together
• 電卓で must stay together
• 会議の前に must stay together

The particles carry the grammatical roles.

Yes, 前 can mean either:

• before in time
• in front of in space

You tell from context.

Examples:

• 会議の前 = before the meeting → time
• 家の前 = in front of the house → place

In this sentence, because 会議 is an event, 会議の前に is naturally understood as before the meeting, not in front of the meeting.

Here are the normal readings:

• 会議 = かいぎ
• の = の
• 前 = まえ
• に = に
• 予算 = よさん
• を = を (pronounced お in modern Japanese)
• 電卓 = でんたく
• で = で
• もう一度 = もういちど
• 計算しました = けいさんしました

So the full sentence is read:

かいぎ の まえ に、よさん を でんたく で もう いちど けいさんしました。

No, not in this sentence.

• 前に is used here for before in time.
• 前で usually refers to a place, like in front of something, and often means an action happens there.

For example:

• 駅の前で待ちました。 = I waited in front of the station.

But:

• 会議の前に計算しました。 = I calculated it before the meeting.

So 前に is correct for the time meaning here.