Final answer:
The sentence "Estos son nuestro carros." is grammatically incorrect in Spanish.
Step-by-step explanation:
The sentence "Estos son nuestro carros." is grammatically incorrect in Spanish. The subject pronoun "nuestro" must agree in gender and number with the noun it modifies. Since "carros" is a masculine plural noun, the correct form of the possessive adjective should be "nuestros." Therefore, the correct sentence would be "Estos son nuestros carros."
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