How to make a simple Calculator part 02

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Learn how to make a calculator app for android using app Inventor, or appybuilder or Thunkable.
Hello, today I will share with you how to make a simple calculator for app Inventor.

:sunglasses: 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 it is like a a group or set of instructions use to make something, for example in this calculator tutorial for app inventor we use a “equals procedure” to calculate the result of the addition or substraction.
So …
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