Мы подвели итоги квартала, то есть обсудили его результаты.

Yes, подвести итоги is a very common Russian expression. Literally, it means something like to bring the results/conclusions together, but in natural English it usually means:

• to sum up
• to review the results
• to take stock
• to wrap up a period by evaluating it

So Мы подвели итоги квартала is a very natural way to say that a group reviewed how the quarter went.

Because the subject is мы = we.

In the past tense, Russian verbs agree with the subject in gender/number:

• подвел = he summed up
• подвела = she summed up
• подвело = it summed up
• подвели = they / we summed up

Since мы is plural, the verb must be подвели.

In this expression, Russian normally uses the plural: подвести итоги.

That is the standard idiom. Even when English might use singular, like sum it up or review the outcome, Russian often prefers plural итоги = results / conclusions / totals.

You would usually not say подвести итог квартала in the same everyday sense. The plural version is much more natural here.

Because итоги takes the thing being summed up in the genitive case.

So:

• итоги чего? = the results of what?
• квартала = of the quarter

This is why you get:

• итоги квартала = the quarter’s results / the results of the quarter

The dictionary form is квартал, but here it changes to квартала because of case.

Here квартал means quarter of a year, especially in business, finance, or reporting.

So итоги квартала means the quarter’s results.

Be aware that квартал can also mean a city block in other contexts. Russian uses the same word for both ideas, so context matters.

То есть means that is, that is to say, or in other words.

It introduces a clarification or rewording:

• Мы подвели итоги квартала, то есть обсудили его результаты.
• We summed up the quarter, that is, we discussed its results.

So the second part explains the first part in simpler or more explicit terms.

Because то есть is a parenthetical linking expression that introduces an explanation or restatement.

Russian normally sets it off with punctuation:

• ..., то есть ...

So the comma is standard and expected here.

Because его refers back to квартала, and квартал is a masculine singular noun.

So:

• квартал → masculine singular
• его результаты = its results / the quarter’s results

Even though итоги and результаты are plural, the pronoun is not referring to them. It refers to квартал.

That is why его is correct.

Russian often uses a pronoun to avoid repetition, just like English.

So both are possible:

• обсудили его результаты
• обсудили результаты квартала

The version with его sounds smoother because it avoids repeating квартала right away.

For the same reason as подвели: the subject is still мы.

So:

• мы обсудили = we discussed

Also, обсудили is a perfective past form, which fits the idea of a completed action: the discussion happened and was finished.

Because the sentence describes completed actions.

• подвести → perfective
• обсудить → perfective

The speaker is talking about a finished event: they completed the quarter review, and they completed the discussion of the results.

If you used imperfective forms, the meaning would shift more toward process, repetition, or background action.

Yes. Russian often drops subject pronouns when the verb ending already makes the subject clear.

So this would also be natural:

• Подвели итоги квартала, то есть обсудили его результаты.

Including мы is not wrong. It may add a little emphasis or make the sentence slightly more explicit.

Not exactly, but they are very close.

• подвести итоги квартала is a set phrase meaning to sum up / review the quarter
• обсудить его результаты literally means to discuss its results

So the second part explains what the first one involved. It is not a word-for-word synonym, but it is a natural clarification.

Yes, Russian word order is flexible, though not always equally natural in every context.

For example, you could say:

• Мы обсудили результаты квартала, то есть подвели итоги квартала.

This is grammatically fine, but the original sentence sounds more idiomatic because it starts with the set business expression подвели итоги квартала and then explains it.

So the original order is probably the most natural in a neutral context.

Yes, formally it is the same word: его can mean both his and its/of it in context.

Russian does not have a separate everyday possessive pronoun specifically for its the way English does. So его can refer to:

• a masculine noun: его результаты = its results
• a male person: его книга = his book

Context tells you which meaning is intended.

It actually is in the normal case expected after обсудить: the accusative.

But for many inanimate plural nouns in Russian, the accusative form looks the same as the nominative form.

So:

• nominative: результаты
• accusative: результаты

That is why the form does not visibly change here.

Here are the main dictionary forms:

• мы = we
• подвести = to sum up, to review, to total up
• итог = result, conclusion, outcome
• квартал = quarter; city block
• то есть = that is, in other words
• обсудить = to discuss
• его = his / its
• результат = result

This can help you recognize the sentence even though some forms are changed by tense or case.