Help with possessive adjectives

Question

Posesiones Write sentences using possessive adjectives to clarify who owns the indicated items.

Ok these are 4 that i am getting wrong and i do not know why. I tried taking out the "Compras, Compramos and Compran" But i am still getting it wrong. A little help in the right direction would be great.

Tú compras una mochila. Tú compras tu mochila

Nosotros compramos una mesa. Nosotros compramos nuestra mesa

Él compra unos lápices. Él compra sus lápices

Ellos compran una calculadora. ellos compran su calculador

Answer 1

I bet the exercise is trying to have you replace the noun completely with a posessive adjective.

• Yo: mío/mía
• Tú: tuyo/tuya
• Él/Ella/Ud.: suyo/suya
• Nosotros: nuestro/nuestra
• Vosotros: vuestro/vuestra
• Ellos/Ellas/Uds.: suyo/suya

For example:

• Es su helado.= It is his ice cream.
• Es suyo= It´s his. (and masculine because helado is masculine)

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Or, another example:

• Son mis botellas. =They are my bottles.
• Son mías. =They are mine (mías because bottles is plural and feminine).

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• He comprado un ordenador.=I bought a computer.
• El ordenador es mío.=The computer is mine.

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• Ellas compraron una pizza grande.=They bought a big pizza.
• La pizza es suya.=The pizza is theirs.

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• Tenemos muchos juegos.=We have a lot of games.
• Los juegos son nuestros.=The games are ours.

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Now try that with your exercise and see what you get.

Answer 2

1 .....la mochila

2 .....la mesa

3 ........los la'pices

4 ........la calculadora