1.Warm up: Why only invention of numeral positional set made the development of effective counting  tools possible?- answering this question after trying to subtract numbers noted in Rom’s  symbols  f.e.    MCDXIII – XII=

2. What are advantages and disadvantages of the 60, decimal and binar numeral set? – filling the chart 

https://docs.google.com/document/d/1vXopgajcHDKq_b1YaCogkPHEpmAY54KZFBW0nIeNJMA/edit?usp=sharing

3. Visiting the exhibition about counting tools.

4. E-learning proposed by Polish group about abacus, slide rule and calculator.

 

5. How to create a calculator with AppInventor ?- material proposed by French team

Part 2 - Part 3 - Part 4

6. Exercises in counting by all tools to choose the representative to take part in international contests.

7. International matches in counting.

 

 

5. Setting the Szkocka Book - making up tasks which cannot be precisely done by PhotoMath application.

https://docs.google.com/a/ekos.edu.pl/presentation/d/1vDAwWqfuMDv5YxHq3CnohLkIvp1TxiORyPpK42kB85E/edit?usp=sharing - link to edit Szkocka Book - you can upload your answers and tasks here