Addition/Subtraction QUIA- MATH JOURNEY: http://www.quia.com/mathjourney.html Travel around the world by answering math problems. The journey begins and ends in London, and has stops in 30 cities along the way. To board the plane to each new city, you must answer a math problem correctly. If you get a problem wrong, you have "missed your flight". Miss three flights and the game is over. Addition skills http://www.aaamath.com/B/grade4.htm#topic3 Subtraction skills http://www.aaamath.com/B/grade4.htm#topic5 Money $$$ Adding with money http://www.aaamath.com/B/dec45ax2.htm Subtracting with money http://www.aaamath.com/B/dec45bx2.htm Making Change http://www.funbrain.com/cashreg/index.html         Test your money skills - learn to make change. Change due http://www.aaamath.com/B/mny313x2.htm         Read then click or scroll to practice skills. Least number of coins for change http://www.aaamath.com/B/mny313x3.htm         Read then click or scroll to practice making change.