Ultimate Math Invaders v2 Master addition, subtraction, multiplication, division, fractions, decimals, percentages, numeration, counting, squares, square roots, powers and directed numbers. Compelling rapid-fire math - 100s of questions in minutes Monitor progress at a glance or drill down to detailed printable reports Simple, kid-friendly animated interface that enhances self-directed learning Focus on areas needing attention or extension by selecting the same topic at a lower or higher level