Try this estimating numbers on a number line quiz. Then work through the page ... Step 2 - Work out what each interval represents. The difference between 500 and 1500 is 1000.

Then the number line changes to become more linear ... at how children's memory for numbers relates to the way they represent numbers in their heads. "Young children's knowledge sometimes seems ...

In Western cultures, people tend to think of numbers increasing in value along a mental number line from left to right ... However, that doesn’t mean culture hadn’t already had an effect ...