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Iniciación al empleo de letras en expresiones algebraicas, Vol. 2El uso, novedoso para el estudiante, de letras como representacin de cantidades no definidas puede ser causa de desconcierto y, en algunos casos, el origen de un persistente obstculo en el aprendizaje matemtico. Este segundo volumen se propone introducir, de manera paulatina, el uso de las letras en el lenguaje algebraico como una ayuda para la comprensin e interpretacin en operaciones de adicin y multiplicacin. Integran este volumen una serie de
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 69 reviews
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Product Reviews
★★★★★ 5
Great value
Color: Camel, Size: 36.0"L x 36.0"W x 7.0"Th
I have three dogs and they all fight over this bed. It is so fluffy. They love it. Great vibrant color, great fit for the dogs, medium and larger.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
★★★★★ 5
Nice dog bed
Color: Camel, Size: 36.0"L x 36.0"W x 7.0"Th
Dog's love them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 5
Great value, comfy, cozy, perfect!
Size: 36" x 36", Color: Grey, Size: 36" x 36", Color: Grey
My dog loves this bed. So do my husband and I. Firm, fuzzy, comfy, security and great value for the price. I recommend it and so glad I purchased it!!
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Super dog bed
Size: 23" x 23", Color: Beige
This review is from my dog Beau, “I love my new bed. It’s cushy and fits my 15 pounds of fluff and fur beautifully. I can stretch out and sleep on my back if I want. I really appreciate that it didn’t have any funky chemical smell when it arrived. My mom ordered the sand color to match my fur. She says it looks just like the picture. It’s really soft and comfortable, I won’t leave it long enough for her to wash it. She had to order a second one for the kitchen so she could finally wash the original. By the way, it washed perfectly and didn’t shrink an inch. “
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Reviewed in the United States on August 31, 2025
★★★★★ 5
Good bed
Size: 36" x 36", Color: Beige
Easy to wash and our dog loves it.
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Reviewed in the United States on April 19, 2026
