…dreams with a devil who won't stop telling him about elementary number theory, using various dream-world props. If you want more problems after that, there are a lot of great puzzles in Kordemsky's The Moscow Puzzles https://archive.org/details/moscowpuzzles3590000kord_m9a0, or you could take a look at Fomin, Genkin, & Itenberg's Mathematical Circles: Russian Experience which your kid could probably just about handle.…
…punishment. If anyone wants some primary school appropriate word problems, let me recommend the collections by Lenchner, e.g. https://archive.org/details/mathematicalolym0000lenc Also try Kordemsky’s Moscow Puzzles https://archive.org/details/boris-a.-kordemsky-the-moscow-pu...
…梦到一个恶魔，对方用各种梦境道具喋喋不休地给他讲初等数论。如果之后你还想做更多题目，Kordemsky 的《The Moscow Puzzles》里有好多很棒的谜题 https://archive.org/details/moscowpuzzles3590000kord_m9a0 ，或者你也可以看看 Fomin、Genkin 和 Itenberg 合著的《Mathematical Circles: Russian Experience》，你家孩子大概刚好能应付得来。…
…dreams with a devil who won't stop telling him about elementary number theory, using various dream-world props. If you want more problems after that, there are a lot of great puzzles in Kordemsky's The Moscow Puzzles https://archive.org/details/moscowpuzzles3590000kord_m9a0, or you could take a look at Fomin, Genkin, & Itenberg's Mathematical Circles: Russian Experience which your kid could probably just about handle.…
…惩罚。如果有人想要适合小学生的数学应用题（word problems），推荐 Lenchner 的合集，例如 https://archive.org/details/mathematicalolym0000lenc 。也可以试试 Kordemsky 的《Moscow Puzzles》https://archive.org/details/boris-a.-kordemsky-the-moscow-pu...
…punishment. If anyone wants some primary school appropriate word problems, let me recommend the collections by Lenchner, e.g. https://archive.org/details/mathematicalolym0000lenc Also try Kordemsky’s Moscow Puzzles https://archive.org/details/boris-a.-kordemsky-the-moscow-pu...
另一个超棒的资源是 Boris Kordemsky 的书《The Moscow Puzzles》：https://www.amazon.com/Moscow-Puzzles-Mathematical-Recreatio...
Another fantastic resource is Boris Kordemsky's book The Moscow Puzzles: https://www.amazon.com/Moscow-Puzzles-Mathematical-Recreatio...