Placing Fractions on a Number Line. Fun online educational math game for children, with fractions on the number line. The game consists of placing the astronaut on the number line, in the position indicated by the fraction, in the place on the line equivalent to the value of the fractional number. If the answer is correct, the astronaut will go on the rocket. If the answer is not correct and the astronaut is not placed in the exact spot, the game will give you a hint by adding subdivisions on the real line or by placing some significant fraction.