to complete the evolution of the business example, let's add requirements for multiply and divide services.
要实现业务示例的演变,我们需要添加对乘法和除法服务的需求。
mathematics: complete 「textbooks to mathematical olympiad」, practice add, subtract, multiply and divide the 10 exercises every day;
数学:完成《课本到奥数》,每天练习加减乘除各10道练习;
by the end of fifth grade, they should be able to multiply and divide .
在五年级结束,他们应该能做乘除法。