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Four-digit numbers can be partitioned into ones, tens, hundreds and thousands. Understanding the value of each digit makes it easier to compare numbers using the less than (<), greater than (>) and ...

When you compare numbers, you find out which is bigger and which is smaller. You can use the words 'less than', 'greater than' or 'equal to' to compare numbers. Each phrase has a matching symbol that ...

The following is an excerpt from Thinking in Numbers: On Life, Love, Meaning, and Math, by Daniel Tammet, out now from Little, Brown. Ask an Icelander what comes after three and he will answer, “Three ...