维奥莱蒂
@violetti
I've heard of an interesting way of practicing memory. Math examples with time. For example: 16:44-13:56=? It's kind of like a crossword puzzle, only mathematical. https://canhrau.com/wp-content/uploads/2022/04/nhung-hinh-anh-phong-canh-dep-nhat-hinh-33.png
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