Ezra 2:64 (KJV)

Were there two hundred singing men and women, or two hundred forty-five?Ezra gives the list taken when the people set out from Babylon; Nehemiah, the register of the company as it came up, with those who joined it on the way.
Why do Ezra’s and Nehemiah’s lists of the returning families differ?Ezra gives the list taken when the people set out from Babylon; Nehemiah, the register of the company as it came up.

The offerings for the templeLet none complain of the needful expenses of their religion. Seek first the kingdom of God, his favour and his glory, then will all other things be added...

Isaiah 10:22 For though thy people Israel be as the sand of the sea, yet a remnant of them shall return: the consumption decreed shall overflow with righteousness.

From Thompson’s Chain-Reference Bible (1908).

Ezra 9:8 And now for a little space grace hath been shewed from the LORD our God, to leave us a remnant to escape, and to give us a nail in his holy place, that our God may lighten our eyes, and give us a little reviving in our bondage.
Nehemiah 7:66–69 The whole congregation together was forty and two thousand three hundred and threescore, …
Isaiah 10:20–22 And it shall come to pass in that day, that the remnant of Israel, and such as are escaped of the house of Jacob, shall no more again stay upon him that smote them; but shall stay upon the LORD, the Holy One of Israel, in truth. …
Jeremiah 23:3 And I will gather the remnant of my flock out of all countries whither I have driven them, and will bring them again to their folds; and they shall be fruitful and increase.

From OpenBible.info, most relevant first.

Captivity Jews return from Captivity
Israel Number of, after the captivity
Israel, prophecies concerning Ezra returns with One-thousand seven-hundred and fifty-four of the exiles to Jerusalem
Music Unclassified scriptures relating to Music
Zerubbabel Leads the Emancipated Jews back from Babylon

The whole congregation כָּל kol Noun · masculine singular construct הַקָּהָל haqqāhāl קָהָל Noun · masculine singular · with the
together כְּאֶחָד kĕʾeḥād אֶחָד Number · masculine singular · with preposition
forty אַרְבַּע ʾarbaʿ אַרְבַּע Number · feminine singular רִבּוֹא ribbôʾ רִבּוֹ Number · masculine or feminine singular
and two thousand אַלְפַּיִם ʾalpayim אֶלֶף Number · masculine or feminine plural
three שְׁלֹשׁ šĕlōš שָׁלוֹשׁ Number · feminine singular
hundred מֵאוֹת mēʾwōt מֵאָה Number · masculine or feminine plural
threescore שִׁשִּׁים šiššîm שִׁשִּׁים Number · masculine or feminine plural

Ezra 2:64 KJV