This is a cool Maths application using which a child can learn and practice the whole number and decimal subtraction concept. A magic robot in the application gives different dollar currency subtraction examples to practice. It monitors the child’s progress and paces the complexity of the problem according to the performance of the child, starting from simple whole number currency subtraction problems to currency subtraction involving different units (dollars, cents) and then moves to decimal subtraction problems. If the child is unable to make progress on a given problem, it walks through the detailed solution of the same problem in an animated way.The child can touch the Report Card icon to see the progress.