Download Adding unit fractions apk 1.1.2 free for Android smartphone

16 Mar
Adding unit fractions

Posted by nummolt in Education | March 16, 2016 | 1 Comments

Apk file size: 971.0 KB

The app proposes 21 challenges to overcome.
Obtaining the proper fractions listed at the top of the application, adding two or three unit fractions.

Each proposed proper fraction has a variable number of solutions.
And different levels of difficulty

You can not repeat unit fractions with the same value.
In the app you'll find a button to delete all the solutions found in the current problem, and to start from scratch.
The littlest unit fraction used in this app is 1/28.

The program is designed to show the usefulness of the subtraction of fractions in solving such problems.

This is an evolution of the "Old Egyptian Fractions" made in collaboration with

In the Rhind Mathematical Papyrus (RMP) in 1650 BC the scribe Ahmes copied the now-lost test from the reign of the king Amenemamhat III .
The first part of the papyrus is taken up by the 2/n table. The fractions 2/n for odd n ranging from 3 to 101 are expressed as sums of unit fractions.
In this app you can build some of the Ahmes decompositions ( 2/3 , 2/5, 2/7, 2/9 ) and the discarded ones by him also.
The app allow to decompose also: 3/4 , 3/5 , 4/5 , 5/6 , 3/7 , 4/7 , 5/7 , 3/8 , 5/8 , 7/8 , 4/9 , 5/9 , 7/9 , 8/9 , 3/10 , 7/10 , 9/10.
You can use the knowledge acquired solving the 2/n decompositions to solve the rest of the problems.

The app "Proper Fractions" (same developer) is the right tool that helps to solve 'adding unit fractions'

Math Tools reference of this app:
Math 1, 2 and 3: Fractions
Math 4: Writing fractions, Equivalent fractions, Comparing and ordering, Simplifying fractions, Adding fractions, Subtracting fractions
Math 5, 6 and 7: Writing fractions, Equivalent fractions, Comparing & ordering, Simplifying fractions, Adding fractions, Subtracting fractions, Multiplying fractions, Dividing fractions

Nummolt apps: "Not Montessori per se, but Montessori-like".

Whats new

    1.1.2 Added nummolt self-reference in non AndroidTV devices
    1.1.1 Detail on translations: Translation word ' of '.
    1.1.0 New landscape layout. Complete version English - Catalan - Castilian (Spanish Spain) + Android TV.

nummolt part of our Education and have average installs from 1000 to 5000. Last Update March 16, 2016. Google play rating is 93.3333. Current verison is 1.1.2. Actual size 971.0 KB.

Download adding-unit-fractions.apk 971.0 KB


David van Deijk

No nonsense app. Straight to business No loading screens, no interruptions, no distractions. I loved playing it and completed all the challenges in a few days. A few improvements are possible, like a modus with smaller fractions more freestyle and maybe a hint how big the difference is between the sum and the fraction.

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