Since I cannot access or download specific PDF files, I have put together a based on the typical content of Piensa Infinito workbooks (a well-known Spanish problem-solving series) and how they align with Singapore Math principles.
Ana has some red and blue blocks. She says, “If I add 1 more red block, I will have twice as many reds as blues.” If she has fewer than 10 blocks in total, how many of each color could she have? Find all possibilities. piensa infinito para 1-- -singapur- pdf