Давай перечитаем текст сначала.

No. Although давай originally comes from the verb давать (to give), in sentences like this it often functions more like come on, let’s, or let’s go ahead and.

So Давай перечитаем... means something like:

• Let’s reread...
• Come on, let’s reread...

It is a very common, natural, conversational way to make a suggestion in Russian.

A more formal or plural version is давайте:

• Давайте перечитаем текст сначала. = Let’s reread the text from the beginning.

That is exactly how Russian usually forms let’s expressions: it often uses a 1st person plural verb form (we form).

So:

• перечитаем literally = we will reread
• давай перечитаем = let’s reread

This is similar to English let us reread, which also uses a plural form even though it is really a suggestion.

Перечитаем comes from перечитать, which means to reread or to read again.

Breakdown:

• читать = to read
• прочитать = to read through / read completely
• перечитать = to reread

So перечитаем specifically includes the idea of again.

About aspect:

• перечитать is perfective
• перечитаем is the 1st person plural future of that perfective verb

Because it is perfective, it suggests a complete action:

• Let’s reread the text = let’s go through it again as a whole

If you used an imperfective form, the nuance would be different and less natural here.

Текст is the direct object of перечитаем, so it is in the accusative case.

However, for many inanimate masculine nouns, the accusative singular looks exactly the same as the nominative singular.

So:

• nominative: текст
• accusative: текст

That is why you do not see a different ending here.

In this sentence, сначала means from the beginning.

So:

• Давай перечитаем текст сначала. = Let’s reread the text from the beginning.

But сначала can also mean at first or first in other contexts.

For example:

• Сначала было трудно. = At first it was difficult.
• Сначала поужинаем, потом пойдём гулять. = First we’ll have dinner, then we’ll go for a walk.

Here, because it goes with перечитаем текст, the meaning from the beginning is the natural one.

Yes, Russian word order is flexible.

The neutral order here is:

• Давай перечитаем текст сначала.

This sounds natural and straightforward.

You could also say:

• Давай сначала перечитаем текст.

This puts a little more focus on сначала: Let’s first / to begin with reread the text.

So both are possible, but they are not always identical in emphasis:

• ...текст сначала = reread the text from the beginning
• сначала перечитаем... = first, let’s reread...

In the given sentence, the final сначала strongly supports the meaning from the beginning.

Russian often leaves out subject pronouns when they are clear from the verb form.

Перечитаем already tells you the subject is we.

So:

• (Мы) перечитаем = we will reread

Adding мы is possible, but it is usually only used for emphasis, contrast, or clarity.

In a normal let’s suggestion, Russian usually just says:

• Давай перечитаем...

Yes. Давай is informal and is normally used when speaking to one person in a casual setting.

If you are speaking:

• to several people, or
• to one person formally,

you usually say давайте instead:

• Давайте перечитаем текст сначала.

That is the standard polite or plural version.

The stress is:

• дава́й
• перечита́ем
• текст
• снача́ла

So the full sentence is pronounced approximately:

дава́й перечита́ем текст снача́ла

A learner should especially notice:

• the stress in дава́й
• the stress in перечита́ем
• the stress in снача́ла

Russian stress is important because unstressed vowels are often reduced in pronunciation.

Yes, but it changes the tone.

For example:

• Перечитаем текст сначала.

This can still mean Let’s reread the text from the beginning, especially depending on intonation, but it may sound more matter-of-fact, more literary, or more like a proposal in context.

Adding давай makes the suggestion sound more conversational and natural in everyday speech:

• Давай перечитаем текст сначала.

The difference is the prefix:

• прочитаем = let’s read
• перечитаем = let’s reread

So if the text has already been read once, перечитаем is the right choice.

Compare:

• Давай прочитаем текст сначала. = Let’s read the text from the beginning.
• Давай перечитаем текст сначала. = Let’s reread the text from the beginning.

The second one clearly implies again.