The notation is better seen and read quietly than spoken aloud. There is more to mathematics than just doing arithmetic. The rules for this can be used one at a time, or one after another. There is more to mathematics than just doing arithmetic or being given formulas and numbers to use in them. The phrase there is more to mathematics than just doing arithmetic or being given formulas and numbers to use in them could be repeated in classrooms as is or in short form as a chorus after each skill is introduced.
Some showmanship appears here.
The symbolic way of writing and thinking is an artificial skill. Talking about the three skills and adding the following message give a first simple image for mathematical thought which is easily grasped by a person with a knowledge of elementary mathematics. The description of calculations that might be done is a first service of mathematics to other subjects. The creation of new calculations by changing old ones is a second service to all subjects using arithmetic. The skills build on the common knowledge of reading, writing, arithmetic, counting, geometric shapes and simple formulas.