For instance, related to “There are 23 passengers on the bus, in order for there to be 12 passengers on the bus how many of them have to get off?” question, fifteen students wrote the mathematical sentence like “23-?=12” and four students wrote the mathematical sentence like “12+?=23.” And three students were able to write more than one mathematical sentence. The writing a mathematical sentence strategy for two-operation problems was not as successful as writing for one-operation problems. The writing mathematical sentence strategy was learned in time, but it could not be one of the applied strategies. Although at the beginning of the application it was used to solve one-operation problems, it was disused by students at the end of the experimental application.