Smart Flashcards Subtraction 1 is a deck of interactive flashcards in book format. Each page has a card with a math problem that flips over to show the answer when you tap on it. Each card also has an animated help screen which explains the answer for the math problem.
Subtraction 1 provides an introduction to subtracting small numbers and is good for beginners. It also helps users to memorize essential number combinations used in all arithmetic. In the animated help, a numberline shows a row of numbers and highlights each number as it finds the solution. Altogether, there are 100 flashcards in this app.