Number Machine. Place Value to 100,000. Number Top It. Place Value to Thousands. Mystery Numbers. Numbers on a Number Line. This is a new version and is also available as an ipad app.
You can play the old version here. Drag the flag to the correct position on a number line. Lots of choice over level, including whole numbers, negative number and decimals. Sea Shell Rounding. Shark Numbers. Base Ten. Dino Place Value.