Hi how to make simple calculator in my educational purpose

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How to make a simple Calculator part 02

Learn how to make a calculator app for android using app Inventor, or appybuilder or Makeroid or Thunkable. Hello, today I will share with you how to make a simple calculator for app Inventor. In part 02 We will make the SUBSTRACTION procedure! and make some improvements to previous procedures! I will share with you source file to follow the tutorial, check video description. Also in the tutorial you will create “procedures” that are very convenient in app inventor. A procedure …