Adding unit fractions +|教育線上App不用買-HotApp4Game

$【免費教育App】Adding unit fractions +-APP點子$

The app proposes 31 challenges to overcome.

Build the proper fractions listed at the top of the application, adding two, three or four unit fractions.

Each proposed proper faction 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 1/66.

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

From www.nummolt.com

$【免費教育App】Adding unit fractions +-APP點子$

This is an evolution of the "Old Egyptian Fractions" made in collaboration with www.mathcats.com

Hint:

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, 2/11 ) 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 , 6/7 , 3/8 , 5/8 , 7/8 , 4/9 , 5/9 , 7/9 , 8/9 , 3/10 , 7/10 , 9/10, 3/11, 4/11, 5/11, 6/11, 7/11, 8/11, 9/11, and 10/11.

You can use the knowledge acquired solving the 2/n decompositions to solve the rest of the problems.

The app warns of obtaining the best solution (the one with the lowest denominators)

$【免費教育App】Adding unit fractions +-APP點子$

If it's one of the problems appearing in the Rhind Mathematical Papyrus table, the app warns of coincidence with the solution written in the Rhind 2/n table.

More: http://nummolt.blogspot.com/2014/12/adding-unit-fractions.html

$【免費教育App】Adding unit fractions +-APP點子$