This app is designed to offer a fun and effective learning environment in which children can learn while they are having fun.

In the Sums Game section and the Subtraction Game you will find the different levels at which the game is divided: easy level, intermediate level and difficult level.

In each one of the levels you will find differents games that the child will gradually learn to add because this app is designed so that pressing on a number this is lit in red color if the answer is a mistake and green if the answer is correct.

When the child does the sum and press the correct number and turns green they just have to press the "next" button to move to the next sum.

In this way the child can complete all the sums for himself because the app shows him at all times if the answer was correct or if he made a mistake.

// Option A //

To download Addition and Subtraction mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Addition and Subtraction mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Addition and Subtraction from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Addition and Subtraction in HappyMod App.