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About the application:

Pure Math Subtracting is a apk for subtracting whole-numbers less than a hundred. Level one is for subtracting single digit numbers. Level two is for subtracting single digit numbers from double digit numbers. Level three is for subtracting double-digit numbers from each another. Please "Visit Developer's Site" for directions. The Pure Math family of apks assist learning math by presenting simultaneous representations of numbers and dot-patterns in order to balance right-brain and left-brain development. These apks share a unified graphical interface in to represent numeric concepts graphically, thereby showing interrelationships between various operations. Non-relevant associations are avoided to prevent their binding on the formation of numeric concepts. LEVELS: Unlike the typical levels in a mini game, the Pure Math apks let one to switch levels of difficulty at any point in time. If there is any similarity to mini games, it is with those that are turn-based, where one has indefinite time to create a move. INTERFACE: The interface is easy on the surface and provides a unified design, the envisioning of info, and a generality across the whole Pure Math family of apks. The development was done for for both handsets and tablets simultaneously in order to work well for both little and really big displays. The apks display in a full-screen mode in order to prevent young kids from toying with menu stuff on handsets. Combinations of blue and cyan color stuff are transformed into pure white stuff for correct responses. Each of these colors could display at a various intensity for the color-blind. These colors were also chosen to avoid any psychological connections with traffic signals. Output is not placed on buttons but instead is placed above or alongside arrows so fingers do not receive in the method. More frequently used touch-screen inputs are create more available at the bottom corners of the screen, and those less frequently used for level changes are along the top of the screen. The operation of the apk is intended to be intuitively obvious without the need to read any instructions, so there could be less culturally-relative and gender-relative impediments. This is necessary since there are hundreds of languages used on earth, each with more than a million people. These apks may be used at any age level in addition to those just starting to learn math, including those that wish to fortify what they know already, and grown-ups that wish to use them as brain-exercises. For preschool through grade 3 students these apks are intended to assist bridge the gap between the mental-image mode and abstract mode. There are no sounds or words whatsoever in these apks, so learning may take put quietly without any dependence on language skills. Numbers are portrayed in their most easy forms to avoid association with any particular fonts and the graphics are rendered in the most minimalistic geometrical form to maximize iconoclasm and minimize anthropomorphism, hopefully building a more pure formation of mathematical concepts without cluttering the mind with narrative discourse and mnemonic-devices. (There is not enough place in this description to continue. Please e-mail developer for more info).