Answer:
Elena tiene 1. los cuadernos de matemáticas y usted tiene 2. el cuaderno de ciencias. ¿Tienes tú 3. una calculadora y 4. unos lápices en la mochila?
Step-by-step explanation:
In this exercise, you have to complete the sentences with the correct indefinite articles and definite articles.
Indefinite articles (''un'', ''una'', ''unos'' and ''unas'') have the same gender and number as the noun they modify; and definite articles (''el'', ''la'', ''los'', ''las'') are used to talk about specific nouns.