Is it useful for pupils to learn abacus mental arithmetic?

So, are there many teachers who say that children's learning pinyin will affect their learning of English? If so, do parents only let their children learn pinyin or English? Is it also very contradictory? Or are we used to driving two-wheelers and then learning to drive four-wheelers? Will there be contradictions?

As for whether it is useful for primary school students to learn abacus mental arithmetic, it depends on the purpose of letting your children learn abacus mental arithmetic. If you just want your child to learn to calculate, I think it is useless to learn abacus mental arithmetic if ide children can calculate. If you want children to develop their intelligence, it is still useful for school-age children. The Ministry of Education visited many kindergartens and primary schools and found that children who have learned abacus mental arithmetic generally perform better in all aspects than those who have not. It is concluded that abacus mental arithmetic has a positive transfer to other disciplines. Some children learn abacus mental arithmetic and think they will do it when they see problems. Teachers don't want to learn when teaching vertical columns, so they will know the results, but they won't write the calculation process of vertical columns, so primary school teachers will have opinions. In fact, it is not a mental arithmetic problem, but a communication problem between teachers and parents and children. In addition, some children don't learn mental arithmetic well, and the result is that they don't learn well. Such children mainly have bad habits, not bad mental arithmetic.