0.7 + 0.3 = 1 at App Store analyse

App power index: 140 (based on ranks around App Stores today)
Entertainment Education
Developer: Paola Mignogna
Price: 0 free
Current version: 1.5.0, last update: 7 years ago
First release : 11 Feb 2013
App size: 10.39 Mb
4.6 ( 9456 ratings )
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Estimation application downloads and cost

> 3.08k
Monthly downloads
~ $ 1.26k
Estimation App Cost


This application generates an infinite sequence of operations with decimal numbers, in all possible combinations, in the following formats:

0.123 + ? = 1

0.123 + 0.1 = ?

0.123 x 100 = ?

12.3 : 1000 = ?

Therefore, to control the improvement in your skills, a detailed summary sheet is available, with all your exercises and answers.

In the "school" section you will find all the tricks to solve the various types of operations, with examples already solved.

After a few session of use, the decimal numbers definitely will have no more secrets!

App is suitable both for children and adults, also for the improvement of mental calculation.
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Available in countries
Country Price
Canada 1.39 CAD
China 6 CNY
France 1.09 EUR
Germany 1.09 EUR
Italy 1.09 EUR
Netherlands 1.09 EUR
Portugal 1.09 EUR
Spain 1.09 EUR
Poland 1.09 EUR
UK 0.99 GBP
India 80 INR
Japan 120 JPY
Poland 4.99 PLN
Russia 75 RUB
Turkey 3.49 TRY
USA 0.99 USD
Korea, Republic Of 1.09 USD
Ukraine 0.99 USD
Available for devices
iPhone3GS, iPhone4, iPodTouchFourthGen, iPad2Wifi, iPad23G, iPhone4S, iPadThirdGen, iPadThirdGen4G, iPhone5, iPodTouchFifthGen, iPadFourthGen, iPadFourthGen4G, iPadMini, iPadMini4G, iPhone5c, iPhone5s, iPadAir, iPadAirCellular, iPadMiniRetina, iPadMiniRetinaCellular, iPhone6, iPhone6Plus, iPadAir2, iPadAir2Cellular, iPadMini3, iPadMini3Cellular, iPodTouchSixthGen, iPhone6s, iPhone6sPlus, iPadMini4, iPadMini4Cellular, iPadPro, iPadProCellular, iPadPro97, iPadPro97Cellular, iPhoneSE, iPhone7, iPhone7Plus, iPad611, iPad612, iPad71, iPad72, iPad73, iPad74,